/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/hard2_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:05:15,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:05:15,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:05:15,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:05:15,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:05:15,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:05:15,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:05:15,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:05:15,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:05:15,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:05:15,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:05:15,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 21:05:15,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:05:15,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:05:15,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:05:15,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:05:15,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:05:15,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:05:15,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:05:15,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:05:15,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:05:15,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:05:15,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:05:15,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:05:15,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:05:15,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:05:15,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:05:15,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:05:15,224 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:05:15,237 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:05:15,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:05:15,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:05:15,240 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:05:15,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:05:15,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:05:15,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:05:15,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:05:15,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:05:15,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:05:15,241 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:05:15,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:05:15,242 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:05:15,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:05:15,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:05:15,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:05:15,242 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:05:15,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:05:15,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:05:15,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:05:15,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:05:15,244 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:05:15,244 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:05:15,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:05:15,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:05:15,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:05:15,504 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:05:15,505 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:05:15,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound2.c [2021-05-02 21:05:15,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f34ff1dc/ed05d47c389743dfa79f1810b8fd9ba5/FLAG2badca608 [2021-05-02 21:05:15,903 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:05:15,903 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound2.c [2021-05-02 21:05:15,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f34ff1dc/ed05d47c389743dfa79f1810b8fd9ba5/FLAG2badca608 [2021-05-02 21:05:15,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f34ff1dc/ed05d47c389743dfa79f1810b8fd9ba5 [2021-05-02 21:05:15,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:05:15,925 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:05:15,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:05:15,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:05:15,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:05:15,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:05:15" (1/1) ... [2021-05-02 21:05:15,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14c79739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:05:15, skipping insertion in model container [2021-05-02 21:05:15,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:05:15" (1/1) ... [2021-05-02 21:05:15,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:05:15,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:05:16,059 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/hard2_unwindbound2.c[526,539] [2021-05-02 21:05:16,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:05:16,078 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:05:16,096 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/hard2_unwindbound2.c[526,539] [2021-05-02 21:05:16,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:05:16,128 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:05:16,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:05:16 WrapperNode [2021-05-02 21:05:16,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:05:16,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:05:16,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:05:16,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:05:16,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:05:16" (1/1) ... [2021-05-02 21:05:16,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:05:16" (1/1) ... [2021-05-02 21:05:16,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:05:16" (1/1) ... [2021-05-02 21:05:16,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:05:16" (1/1) ... [2021-05-02 21:05:16,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:05:16" (1/1) ... [2021-05-02 21:05:16,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:05:16" (1/1) ... [2021-05-02 21:05:16,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:05:16" (1/1) ... [2021-05-02 21:05:16,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:05:16,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:05:16,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:05:16,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:05:16,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:05:16" (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 21:05:16,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:05:16,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:05:16,234 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:05:16,234 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:05:16,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:05:16,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:05:16,234 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:05:16,234 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:05:16,234 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:05:16,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:05:16,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 21:05:16,235 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:05:16,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:05:16,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:05:16,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:05:16,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:05:16,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:05:16,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:05:16,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:05:16,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:05:16,450 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:05:16,450 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 21:05:16,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:05:16 BoogieIcfgContainer [2021-05-02 21:05:16,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:05:16,451 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:05:16,452 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:05:16,452 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:05:16,454 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:05:16" (1/1) ... [2021-05-02 21:05:16,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:05:16 BasicIcfg [2021-05-02 21:05:16,476 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:05:16,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:05:16,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:05:16,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:05:16,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:05:15" (1/4) ... [2021-05-02 21:05:16,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595a581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:05:16, skipping insertion in model container [2021-05-02 21:05:16,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:05:16" (2/4) ... [2021-05-02 21:05:16,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595a581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:05:16, skipping insertion in model container [2021-05-02 21:05:16,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:05:16" (3/4) ... [2021-05-02 21:05:16,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595a581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:05:16, skipping insertion in model container [2021-05-02 21:05:16,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:05:16" (4/4) ... [2021-05-02 21:05:16,481 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound2.cJordan [2021-05-02 21:05:16,484 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:05:16,487 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:05:16,497 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:05:16,508 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:05:16,508 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:05:16,508 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:05:16,508 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:05:16,508 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:05:16,508 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:05:16,508 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:05:16,509 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:05:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 21:05:16,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 21:05:16,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:05:16,521 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:05:16,521 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:05:16,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:05:16,524 INFO L82 PathProgramCache]: Analyzing trace with hash 121155216, now seen corresponding path program 1 times [2021-05-02 21:05:16,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:05:16,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735362902] [2021-05-02 21:05:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:05:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:05:16,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:05:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:05:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:05:16,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:05:16,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735362902] [2021-05-02 21:05:16,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735362902] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:05:16,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:05:16,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:05:16,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555071290] [2021-05-02 21:05:16,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:05:16,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:05:16,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:05:16,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:05:16,713 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 21:05:16,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:05:16,822 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-05-02 21:05:16,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:05:16,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 21:05:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:05:16,829 INFO L225 Difference]: With dead ends: 32 [2021-05-02 21:05:16,830 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 21:05:16,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:05:16,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 21:05:16,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 21:05:16,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 21:05:16,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-05-02 21:05:16,858 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2021-05-02 21:05:16,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:05:16,858 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-05-02 21:05:16,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 21:05:16,859 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-05-02 21:05:16,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 21:05:16,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:05:16,860 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:05:16,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:05:16,861 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:05:16,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:05:16,862 INFO L82 PathProgramCache]: Analyzing trace with hash 152644303, now seen corresponding path program 1 times [2021-05-02 21:05:16,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:05:16,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940104955] [2021-05-02 21:05:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:05:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:05:16,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:05:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:05:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:05:16,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:05:16,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940104955] [2021-05-02 21:05:16,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940104955] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:05:16,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:05:16,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 21:05:16,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46289506] [2021-05-02 21:05:16,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 21:05:16,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:05:16,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 21:05:16,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:05:16,978 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 21:05:17,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:05:17,204 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2021-05-02 21:05:17,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:05:17,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 21:05:17,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:05:17,206 INFO L225 Difference]: With dead ends: 39 [2021-05-02 21:05:17,206 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 21:05:17,208 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:05:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 21:05:17,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-05-02 21:05:17,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 21:05:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-02 21:05:17,219 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2021-05-02 21:05:17,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:05:17,220 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-02 21:05:17,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 21:05:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-02 21:05:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 21:05:17,220 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:05:17,221 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:05:17,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 21:05:17,221 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:05:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:05:17,223 INFO L82 PathProgramCache]: Analyzing trace with hash -400958603, now seen corresponding path program 1 times [2021-05-02 21:05:17,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:05:17,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826726839] [2021-05-02 21:05:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:05:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:05:17,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:05:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:05:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:05:17,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:05:17,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826726839] [2021-05-02 21:05:17,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826726839] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:05:17,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:05:17,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 21:05:17,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979928582] [2021-05-02 21:05:17,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 21:05:17,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:05:17,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 21:05:17,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 21:05:17,335 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 21:05:17,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:05:17,482 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-05-02 21:05:17,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 21:05:17,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 21:05:17,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:05:17,483 INFO L225 Difference]: With dead ends: 32 [2021-05-02 21:05:17,483 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 21:05:17,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:05:17,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 21:05:17,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 21:05:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 21:05:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 21:05:17,486 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2021-05-02 21:05:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:05:17,486 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 21:05:17,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 21:05:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 21:05:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 21:05:17,487 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:05:17,487 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:05:17,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 21:05:17,487 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:05:17,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:05:17,487 INFO L82 PathProgramCache]: Analyzing trace with hash 185978583, now seen corresponding path program 1 times [2021-05-02 21:05:17,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:05:17,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909193862] [2021-05-02 21:05:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:05:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:05:17,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:05:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:05:17,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-02 21:05:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:05:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:05:17,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:05:17,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909193862] [2021-05-02 21:05:17,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909193862] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:05:17,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:05:17,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 21:05:17,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849356451] [2021-05-02 21:05:17,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 21:05:17,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:05:17,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 21:05:17,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:05:17,590 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 21:05:17,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:05:17,784 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-02 21:05:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:05:17,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-02 21:05:17,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:05:17,789 INFO L225 Difference]: With dead ends: 44 [2021-05-02 21:05:17,789 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 21:05:17,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:05:17,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 21:05:17,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2021-05-02 21:05:17,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 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 21:05:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2021-05-02 21:05:17,804 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2021-05-02 21:05:17,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:05:17,804 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2021-05-02 21:05:17,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 21:05:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2021-05-02 21:05:17,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 21:05:17,805 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:05:17,805 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:05:17,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 21:05:17,805 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:05:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:05:17,806 INFO L82 PathProgramCache]: Analyzing trace with hash -820589269, now seen corresponding path program 1 times [2021-05-02 21:05:17,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:05:17,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532079194] [2021-05-02 21:05:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:05:17,814 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:05:17,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738742418] [2021-05-02 21:05:17,815 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 21:05:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:05:17,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 21:05:17,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:05:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 21:05:17,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:05:17,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532079194] [2021-05-02 21:05:17,976 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:05:17,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738742418] [2021-05-02 21:05:17,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738742418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:05:17,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:05:17,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 21:05:17,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373939890] [2021-05-02 21:05:17,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:05:17,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:05:17,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:05:17,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:05:17,977 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:05:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:05:18,085 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-05-02 21:05:18,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 21:05:18,086 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-05-02 21:05:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:05:18,087 INFO L225 Difference]: With dead ends: 55 [2021-05-02 21:05:18,087 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 21:05:18,087 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:05:18,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 21:05:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 21:05:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 21:05:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2021-05-02 21:05:18,091 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 22 [2021-05-02 21:05:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:05:18,092 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2021-05-02 21:05:18,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:05:18,092 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2021-05-02 21:05:18,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 21:05:18,092 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:05:18,092 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:05:18,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:05:18,309 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:05:18,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:05:18,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1259710898, now seen corresponding path program 1 times [2021-05-02 21:05:18,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:05:18,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003540435] [2021-05-02 21:05:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:05:18,325 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:05:18,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205534492] [2021-05-02 21:05:18,325 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 21:05:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:05:18,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 21:05:18,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:05:18,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:05:18,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:05:18,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:05:18,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:05:18,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:05:18,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:05:18,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:05:18,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:05:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 21:05:18,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:05:18,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003540435] [2021-05-02 21:05:18,485 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:05:18,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205534492] [2021-05-02 21:05:18,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205534492] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:05:18,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:05:18,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 21:05:18,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942789020] [2021-05-02 21:05:18,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 21:05:18,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:05:18,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 21:05:18,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 21:05:18,487 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 21:05:18,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:05:18,508 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2021-05-02 21:05:18,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 21:05:18,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 21:05:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:05:18,509 INFO L225 Difference]: With dead ends: 63 [2021-05-02 21:05:18,509 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 21:05:18,510 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 21:05:18,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 21:05:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-05-02 21:05:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 21:05:18,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-05-02 21:05:18,513 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2021-05-02 21:05:18,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:05:18,514 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-05-02 21:05:18,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 21:05:18,514 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-05-02 21:05:18,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 21:05:18,514 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:05:18,514 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:05:18,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:05:18,729 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:05:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:05:18,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1260813165, now seen corresponding path program 1 times [2021-05-02 21:05:18,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:05:18,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457576443] [2021-05-02 21:05:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:05:18,736 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:05:18,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483373604] [2021-05-02 21:05:18,736 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 21:05:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:05:18,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 21:05:18,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:05:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 21:05:18,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:05:18,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457576443] [2021-05-02 21:05:18,841 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:05:18,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483373604] [2021-05-02 21:05:18,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483373604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:05:18,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:05:18,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 21:05:18,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504366117] [2021-05-02 21:05:18,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 21:05:18,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:05:18,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 21:05:18,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 21:05:18,843 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 21:05:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:05:18,921 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2021-05-02 21:05:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 21:05:18,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 21:05:18,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:05:18,922 INFO L225 Difference]: With dead ends: 74 [2021-05-02 21:05:18,922 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 21:05:18,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 21:05:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 21:05:18,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 21:05:18,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 21:05:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-05-02 21:05:18,926 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2021-05-02 21:05:18,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:05:18,926 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-05-02 21:05:18,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 21:05:18,926 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-05-02 21:05:18,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 21:05:18,927 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:05:18,927 INFO L523 BasicCegarLoop]: trace histogram [5, 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] [2021-05-02 21:05:19,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:05:19,145 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:05:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:05:19,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1811137592, now seen corresponding path program 1 times [2021-05-02 21:05:19,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:05:19,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954588826] [2021-05-02 21:05:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:05:19,152 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:05:19,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999866756] [2021-05-02 21:05:19,152 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 21:05:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:05:19,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 21:05:19,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:05:19,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:05:19,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:05:19,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:05:19,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:05:19,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:05:19,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:05:19,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:05:19,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:05:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-05-02 21:05:19,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:05:19,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954588826] [2021-05-02 21:05:19,376 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:05:19,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999866756] [2021-05-02 21:05:19,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999866756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:05:19,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:05:19,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 21:05:19,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769511147] [2021-05-02 21:05:19,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 21:05:19,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:05:19,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 21:05:19,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 21:05:19,380 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 21:05:19,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:05:19,407 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2021-05-02 21:05:19,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 21:05:19,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-02 21:05:19,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:05:19,411 INFO L225 Difference]: With dead ends: 65 [2021-05-02 21:05:19,411 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 21:05:19,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:05:19,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 21:05:19,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 21:05:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 21:05:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-05-02 21:05:19,423 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 37 [2021-05-02 21:05:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:05:19,424 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-05-02 21:05:19,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 21:05:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-05-02 21:05:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 21:05:19,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:05:19,426 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:05:19,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:05:19,627 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:05:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:05:19,627 INFO L82 PathProgramCache]: Analyzing trace with hash -599722260, now seen corresponding path program 1 times [2021-05-02 21:05:19,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:05:19,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871369601] [2021-05-02 21:05:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:05:19,633 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:05:19,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338470947] [2021-05-02 21:05:19,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:05:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:05:19,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 21:05:19,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:05:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 21:05:19,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:05:19,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871369601] [2021-05-02 21:05:19,767 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:05:19,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338470947] [2021-05-02 21:05:19,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338470947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:05:19,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:05:19,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 21:05:19,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854781589] [2021-05-02 21:05:19,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 21:05:19,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:05:19,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 21:05:19,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 21:05:19,768 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 21:05:19,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:05:19,915 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2021-05-02 21:05:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:05:19,916 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-02 21:05:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:05:19,917 INFO L225 Difference]: With dead ends: 92 [2021-05-02 21:05:19,917 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 21:05:19,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 21:05:19,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 21:05:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-05-02 21:05:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 54 states have internal predecessors, (63), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 21:05:19,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2021-05-02 21:05:19,921 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 40 [2021-05-02 21:05:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:05:19,921 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2021-05-02 21:05:19,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 21:05:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2021-05-02 21:05:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 21:05:19,922 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:05:19,922 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:05:20,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:05:20,138 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:05:20,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:05:20,139 INFO L82 PathProgramCache]: Analyzing trace with hash 560903707, now seen corresponding path program 1 times [2021-05-02 21:05:20,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:05:20,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509461437] [2021-05-02 21:05:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:05:20,144 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:05:20,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065114767] [2021-05-02 21:05:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:05:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 21:05:20,195 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 21:05:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 21:05:20,211 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 21:05:20,247 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 21:05:20,248 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 21:05:20,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:05:20,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:05:20 BasicIcfg [2021-05-02 21:05:20,488 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 21:05:20,488 INFO L168 Benchmark]: Toolchain (without parser) took 4563.53 ms. Allocated memory was 188.7 MB in the beginning and 226.5 MB in the end (delta: 37.7 MB). Free memory was 153.7 MB in the beginning and 87.1 MB in the end (delta: 66.6 MB). Peak memory consumption was 105.4 MB. Max. memory is 8.0 GB. [2021-05-02 21:05:20,489 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 188.7 MB. Free memory is still 169.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 21:05:20,489 INFO L168 Benchmark]: CACSL2BoogieTranslator took 200.52 ms. Allocated memory is still 188.7 MB. Free memory was 153.3 MB in the beginning and 171.9 MB in the end (delta: -18.5 MB). Peak memory consumption was 12.2 MB. Max. memory is 8.0 GB. [2021-05-02 21:05:20,489 INFO L168 Benchmark]: Boogie Preprocessor took 35.75 ms. Allocated memory is still 188.7 MB. Free memory was 171.9 MB in the beginning and 170.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 21:05:20,489 INFO L168 Benchmark]: RCFGBuilder took 283.72 ms. Allocated memory is still 188.7 MB. Free memory was 170.3 MB in the beginning and 154.1 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 21:05:20,489 INFO L168 Benchmark]: IcfgTransformer took 24.26 ms. Allocated memory is still 188.7 MB. Free memory was 154.1 MB in the beginning and 153.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 21:05:20,489 INFO L168 Benchmark]: TraceAbstraction took 4011.15 ms. Allocated memory was 188.7 MB in the beginning and 226.5 MB in the end (delta: 37.7 MB). Free memory was 152.5 MB in the beginning and 87.1 MB in the end (delta: 65.4 MB). Peak memory consumption was 103.7 MB. Max. memory is 8.0 GB. [2021-05-02 21:05:20,489 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 188.7 MB. Free memory is still 169.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 200.52 ms. Allocated memory is still 188.7 MB. Free memory was 153.3 MB in the beginning and 171.9 MB in the end (delta: -18.5 MB). Peak memory consumption was 12.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.75 ms. Allocated memory is still 188.7 MB. Free memory was 171.9 MB in the beginning and 170.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 283.72 ms. Allocated memory is still 188.7 MB. Free memory was 170.3 MB in the beginning and 154.1 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 24.26 ms. Allocated memory is still 188.7 MB. Free memory was 154.1 MB in the beginning and 153.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4011.15 ms. Allocated memory was 188.7 MB in the beginning and 226.5 MB in the end (delta: 37.7 MB). Free memory was 152.5 MB in the beginning and 87.1 MB in the end (delta: 65.4 MB). Peak memory consumption was 103.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=15, counter=0] [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [\old(counter)=0, A=1, B=1, counter=0, d=1, p=1, q=0, r=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=1, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=1, B=1, counter=1, d=2, p=2, q=0, r=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=1, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L38] COND TRUE !(r >= d) VAL [\old(counter)=0, A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L44] EXPR counter++ VAL [\old(counter)=0, A=1, B=1, counter=3, counter++=2, d=2, p=2, q=0, r=1] [L44] COND FALSE !(counter++<2) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L58] RET __VERIFIER_assert(A == d*q + r) VAL [\old(counter)=0, A=1, B=1, counter=3, d=2, p=2, q=0, r=1] [L59] CALL __VERIFIER_assert(B == d) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3941.8ms, OverallIterations: 10, TraceHistogramMax: 8, EmptinessCheckTime: 12.3ms, AutomataDifference: 1102.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 292 SDtfs, 124 SDslu, 687 SDs, 0 SdLazy, 642 SolverSat, 82 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 551.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 196 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 534.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=9, InterpolantAutomatonStates: 58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 72.6ms AutomataMinimizationTime, 9 MinimizatonAttempts, 22 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 72.0ms SsaConstructionTime, 181.1ms SatisfiabilityAnalysisTime, 858.0ms InterpolantComputationTime, 267 NumberOfCodeBlocks, 267 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 205 ConstructedInterpolants, 0 QuantifiedInterpolants, 778 SizeOfPredicates, 16 NumberOfNonLiveVariables, 735 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 113/135 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...