/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/sqrt1-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:51:38,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:51:38,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:51:38,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 22:51:38,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:51:38,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:51:38,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:51:38,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:51:38,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:51:38,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:51:38,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:51:38,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:51:38,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:51:38,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:51:38,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:51:38,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:51:38,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:51:38,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:51:38,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:51:38,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:51:38,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:51:38,739 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:51:38,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:51:38,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:51:38,740 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:51:38,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:51:38,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:51:38,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:51:38,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:51:38,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:51:38,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:51:38,741 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:51:38,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:51:38,741 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:51:38,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:51:38,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:51:38,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:51:38,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:51:38,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:51:38,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:51:38,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:51:38,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:51:38,743 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:51:38,743 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:51:38,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:51:39,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:51:39,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:51:39,016 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:51:39,020 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:51:39,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound20.c [2021-05-02 22:51:39,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3802c035/8beda8642ad8435d9445cf5c5fa11f9a/FLAGb315de5dc [2021-05-02 22:51:39,406 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:51:39,407 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound20.c [2021-05-02 22:51:39,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3802c035/8beda8642ad8435d9445cf5c5fa11f9a/FLAGb315de5dc [2021-05-02 22:51:39,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3802c035/8beda8642ad8435d9445cf5c5fa11f9a [2021-05-02 22:51:39,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:51:39,823 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:51:39,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:51:39,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:51:39,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:51:39,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:51:39" (1/1) ... [2021-05-02 22:51:39,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4063f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:39, skipping insertion in model container [2021-05-02 22:51:39,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:51:39" (1/1) ... [2021-05-02 22:51:39,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:51:39,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:51:39,927 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/sqrt1-ll_valuebound20.c[520,533] [2021-05-02 22:51:39,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:51:39,948 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:51:39,962 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/sqrt1-ll_valuebound20.c[520,533] [2021-05-02 22:51:39,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:51:39,986 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:51:39,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:39 WrapperNode [2021-05-02 22:51:39,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:51:39,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:51:39,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:51:39,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:51:39,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:39" (1/1) ... [2021-05-02 22:51:39,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:39" (1/1) ... [2021-05-02 22:51:40,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:39" (1/1) ... [2021-05-02 22:51:40,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:39" (1/1) ... [2021-05-02 22:51:40,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:39" (1/1) ... [2021-05-02 22:51:40,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:39" (1/1) ... [2021-05-02 22:51:40,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:39" (1/1) ... [2021-05-02 22:51:40,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:51:40,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:51:40,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:51:40,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:51:40,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:39" (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 22:51:40,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:51:40,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:51:40,092 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:51:40,092 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:51:40,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:51:40,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:51:40,093 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:51:40,093 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:51:40,093 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:51:40,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:51:40,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 22:51:40,094 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:51:40,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:51:40,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:51:40,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:51:40,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:51:40,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:51:40,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:51:40,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:51:40,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:51:40,296 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:51:40,296 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:51:40,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:40 BoogieIcfgContainer [2021-05-02 22:51:40,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:51:40,298 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:51:40,298 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:51:40,298 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:51:40,300 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:40" (1/1) ... [2021-05-02 22:51:40,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:51:40 BasicIcfg [2021-05-02 22:51:40,311 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:51:40,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:51:40,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:51:40,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:51:40,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:51:39" (1/4) ... [2021-05-02 22:51:40,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c13f8ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:51:40, skipping insertion in model container [2021-05-02 22:51:40,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:39" (2/4) ... [2021-05-02 22:51:40,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c13f8ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:51:40, skipping insertion in model container [2021-05-02 22:51:40,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:40" (3/4) ... [2021-05-02 22:51:40,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c13f8ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:51:40, skipping insertion in model container [2021-05-02 22:51:40,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:51:40" (4/4) ... [2021-05-02 22:51:40,316 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound20.cJordan [2021-05-02 22:51:40,319 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:51:40,321 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:51:40,332 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:51:40,343 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:51:40,343 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:51:40,343 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:51:40,343 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:51:40,343 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:51:40,343 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:51:40,343 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:51:40,343 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:51:40,351 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:51:40,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:51:40,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:40,356 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:40,356 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:40,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:40,359 INFO L82 PathProgramCache]: Analyzing trace with hash -179702132, now seen corresponding path program 1 times [2021-05-02 22:51:40,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:40,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346655231] [2021-05-02 22:51:40,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:40,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:51:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:40,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:51:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:40,524 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 22:51:40,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:40,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346655231] [2021-05-02 22:51:40,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346655231] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:51:40,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:51:40,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:51:40,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678337070] [2021-05-02 22:51:40,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:51:40,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:40,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:51:40,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:51:40,538 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:40,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:40,606 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-05-02 22:51:40,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:51:40,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:51:40,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:40,613 INFO L225 Difference]: With dead ends: 31 [2021-05-02 22:51:40,613 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 22:51:40,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:51:40,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 22:51:40,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 22:51:40,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 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 22:51:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-02 22:51:40,636 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-02 22:51:40,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:40,636 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-02 22:51:40,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:40,636 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-02 22:51:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:51:40,637 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:40,637 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:40,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:51:40,637 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:40,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:40,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1985279762, now seen corresponding path program 1 times [2021-05-02 22:51:40,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:40,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692108885] [2021-05-02 22:51:40,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:40,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:51:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:40,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:51:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:40,788 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 22:51:40,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:40,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692108885] [2021-05-02 22:51:40,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692108885] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:51:40,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:51:40,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 22:51:40,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919059666] [2021-05-02 22:51:40,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:51:40,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:40,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:51:40,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:40,791 INFO L87 Difference]: Start difference. First operand 26 states and 31 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), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:41,002 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 22:51:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:41,003 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), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:51:41,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:41,005 INFO L225 Difference]: With dead ends: 38 [2021-05-02 22:51:41,006 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 22:51:41,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:41,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 22:51:41,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-02 22:51:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:51:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 22:51:41,021 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2021-05-02 22:51:41,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:41,021 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 22:51:41,021 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), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:41,022 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 22:51:41,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 22:51:41,023 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:41,023 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:41,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 22:51:41,025 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:41,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1146988413, now seen corresponding path program 1 times [2021-05-02 22:51:41,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:41,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479130293] [2021-05-02 22:51:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:41,043 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:41,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832312006] [2021-05-02 22:51:41,043 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 22:51:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:41,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 22:51:41,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:51:41,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:41,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479130293] [2021-05-02 22:51:41,219 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:41,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832312006] [2021-05-02 22:51:41,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832312006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:41,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:41,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:41,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244498638] [2021-05-02 22:51:41,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:41,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:41,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:41,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:41,221 INFO L87 Difference]: Start difference. First operand 36 states and 45 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), 2 states have call successors, (3) [2021-05-02 22:51:41,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:41,319 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-02 22:51:41,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:41,319 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), 2 states have call successors, (3) Word has length 22 [2021-05-02 22:51:41,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:41,321 INFO L225 Difference]: With dead ends: 42 [2021-05-02 22:51:41,321 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 22:51:41,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:41,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 22:51:41,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 22:51:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:51:41,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-02 22:51:41,329 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2021-05-02 22:51:41,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:41,329 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-02 22:51:41,330 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), 2 states have call successors, (3) [2021-05-02 22:51:41,330 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-02 22:51:41,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 22:51:41,331 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:41,331 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:41,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 22:51:41,545 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:41,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:41,546 INFO L82 PathProgramCache]: Analyzing trace with hash 196845204, now seen corresponding path program 1 times [2021-05-02 22:51:41,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:41,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388696945] [2021-05-02 22:51:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:41,557 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:41,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476221814] [2021-05-02 22:51:41,558 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 22:51:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:41,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 22:51:41,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:51:41,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:41,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388696945] [2021-05-02 22:51:41,675 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:41,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476221814] [2021-05-02 22:51:41,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476221814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:41,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:41,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:51:41,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393288218] [2021-05-02 22:51:41,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:51:41,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:41,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:51:41,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:41,676 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 22:51:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:41,723 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-05-02 22:51:41,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:51:41,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 22:51:41,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:41,724 INFO L225 Difference]: With dead ends: 51 [2021-05-02 22:51:41,724 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 22:51:41,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:41,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 22:51:41,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-05-02 22:51:41,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:51:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-05-02 22:51:41,729 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 34 [2021-05-02 22:51:41,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:41,729 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-05-02 22:51:41,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 22:51:41,729 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-05-02 22:51:41,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 22:51:41,730 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:41,730 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:41,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:41,951 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:41,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:41,951 INFO L82 PathProgramCache]: Analyzing trace with hash -374953577, now seen corresponding path program 2 times [2021-05-02 22:51:41,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:41,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552438160] [2021-05-02 22:51:41,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:41,967 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:41,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229151898] [2021-05-02 22:51:41,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:51:42,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:51:42,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:42,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:51:42,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 22:51:42,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:42,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552438160] [2021-05-02 22:51:42,096 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:42,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229151898] [2021-05-02 22:51:42,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229151898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:42,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:42,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:42,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706287472] [2021-05-02 22:51:42,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:42,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:42,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:42,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:42,098 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 22:51:42,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:42,227 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-05-02 22:51:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:42,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-02 22:51:42,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:42,229 INFO L225 Difference]: With dead ends: 55 [2021-05-02 22:51:42,229 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 22:51:42,230 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 22:51:42,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 22:51:42,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:51:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-02 22:51:42,234 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 39 [2021-05-02 22:51:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:42,234 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-02 22:51:42,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 22:51:42,234 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-02 22:51:42,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 22:51:42,235 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:42,235 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:42,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:42,445 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:42,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:42,445 INFO L82 PathProgramCache]: Analyzing trace with hash -786894479, now seen corresponding path program 3 times [2021-05-02 22:51:42,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:42,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972445355] [2021-05-02 22:51:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:42,452 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:42,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635446701] [2021-05-02 22:51:42,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:51:42,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 22:51:42,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:42,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:51:42,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:42,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 22:51:42,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:42,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972445355] [2021-05-02 22:51:42,607 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:42,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635446701] [2021-05-02 22:51:42,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635446701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:42,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:42,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:42,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984645887] [2021-05-02 22:51:42,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:42,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:42,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:42,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:42,616 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:51:42,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:42,692 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-05-02 22:51:42,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:42,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-02 22:51:42,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:42,695 INFO L225 Difference]: With dead ends: 59 [2021-05-02 22:51:42,695 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 22:51:42,695 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 22:51:42,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 22:51:42,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:51:42,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-05-02 22:51:42,710 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 44 [2021-05-02 22:51:42,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:42,711 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-05-02 22:51:42,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:51:42,711 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-05-02 22:51:42,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 22:51:42,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:42,712 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:42,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:42,928 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:42,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:42,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1256212910, now seen corresponding path program 4 times [2021-05-02 22:51:42,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:42,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571032101] [2021-05-02 22:51:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:42,935 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:42,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342353488] [2021-05-02 22:51:42,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 22:51:42,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:51:42,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:42,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 22:51:42,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 22:51:43,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:43,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571032101] [2021-05-02 22:51:43,076 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:43,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342353488] [2021-05-02 22:51:43,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342353488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:43,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:43,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:51:43,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094269129] [2021-05-02 22:51:43,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:51:43,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:43,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:51:43,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:43,077 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 22:51:43,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:43,136 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2021-05-02 22:51:43,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:43,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-02 22:51:43,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:43,138 INFO L225 Difference]: With dead ends: 68 [2021-05-02 22:51:43,138 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 22:51:43,138 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:43,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 22:51:43,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-05-02 22:51:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 39 states have internal predecessors, (40), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 22:51:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-05-02 22:51:43,141 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 51 [2021-05-02 22:51:43,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:43,141 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-05-02 22:51:43,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 22:51:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-05-02 22:51:43,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 22:51:43,142 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:43,142 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:43,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 22:51:43,359 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:43,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:43,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2048057021, now seen corresponding path program 5 times [2021-05-02 22:51:43,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:43,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640800263] [2021-05-02 22:51:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:43,373 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:43,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307579221] [2021-05-02 22:51:43,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 22:51:43,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-02 22:51:43,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:43,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 22:51:43,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 22:51:43,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:43,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640800263] [2021-05-02 22:51:43,536 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:43,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307579221] [2021-05-02 22:51:43,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307579221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:43,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:43,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:51:43,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798544097] [2021-05-02 22:51:43,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:51:43,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:43,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:51:43,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:51:43,537 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 22:51:43,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:43,670 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-05-02 22:51:43,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:51:43,671 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-02 22:51:43,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:43,671 INFO L225 Difference]: With dead ends: 72 [2021-05-02 22:51:43,672 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 22:51:43,672 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:51:43,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 22:51:43,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-02 22:51:43,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 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 22:51:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-05-02 22:51:43,675 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 56 [2021-05-02 22:51:43,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:43,676 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-05-02 22:51:43,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 22:51:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-05-02 22:51:43,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 22:51:43,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:43,677 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:43,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:43,881 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:43,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:43,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1440613387, now seen corresponding path program 6 times [2021-05-02 22:51:43,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:43,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342595714] [2021-05-02 22:51:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:43,888 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:43,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402638810] [2021-05-02 22:51:43,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:43,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 22:51:43,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:43,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 22:51:43,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:43,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:43,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:44,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:44,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:44,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:44,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:44,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:44,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:44,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:44,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:44,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:44,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 22:51:44,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:44,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342595714] [2021-05-02 22:51:44,143 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:44,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402638810] [2021-05-02 22:51:44,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402638810] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:44,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:44,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:51:44,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329567262] [2021-05-02 22:51:44,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:51:44,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:44,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:51:44,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:51:44,144 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 22:51:44,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:44,265 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-05-02 22:51:44,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:51:44,265 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-02 22:51:44,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:44,266 INFO L225 Difference]: With dead ends: 76 [2021-05-02 22:51:44,266 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 22:51:44,266 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:51:44,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 22:51:44,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 22:51:44,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:51:44,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-05-02 22:51:44,269 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 61 [2021-05-02 22:51:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:44,269 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-05-02 22:51:44,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 22:51:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-05-02 22:51:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 22:51:44,270 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:44,270 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:44,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:44,480 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:44,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:44,480 INFO L82 PathProgramCache]: Analyzing trace with hash 555218388, now seen corresponding path program 7 times [2021-05-02 22:51:44,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:44,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801841228] [2021-05-02 22:51:44,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:44,486 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:44,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514463720] [2021-05-02 22:51:44,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:44,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 22:51:44,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 22:51:44,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:44,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801841228] [2021-05-02 22:51:44,653 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:44,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514463720] [2021-05-02 22:51:44,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514463720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:44,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:44,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:44,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313752207] [2021-05-02 22:51:44,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:44,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:44,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:44,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:44,654 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 22:51:44,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:44,722 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2021-05-02 22:51:44,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:44,723 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2021-05-02 22:51:44,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:44,723 INFO L225 Difference]: With dead ends: 85 [2021-05-02 22:51:44,724 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 22:51:44,724 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:51:44,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 22:51:44,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-05-02 22:51:44,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.0625) internal successors, (51), 50 states have internal predecessors, (51), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 22:51:44,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2021-05-02 22:51:44,727 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 68 [2021-05-02 22:51:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:44,727 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-05-02 22:51:44,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 22:51:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2021-05-02 22:51:44,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 22:51:44,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:44,728 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:44,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:51:44,929 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:44,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:44,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1331766697, now seen corresponding path program 8 times [2021-05-02 22:51:44,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:44,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476418385] [2021-05-02 22:51:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:44,935 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:44,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793878327] [2021-05-02 22:51:44,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:44,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:51:44,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:44,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 22:51:44,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 19 proven. 52 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-02 22:51:45,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:45,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476418385] [2021-05-02 22:51:45,131 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:45,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793878327] [2021-05-02 22:51:45,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793878327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:45,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:45,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:51:45,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973116431] [2021-05-02 22:51:45,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:51:45,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:45,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:51:45,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:45,132 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 22:51:45,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:45,295 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2021-05-02 22:51:45,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:51:45,295 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2021-05-02 22:51:45,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:45,296 INFO L225 Difference]: With dead ends: 89 [2021-05-02 22:51:45,296 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 22:51:45,296 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:51:45,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 22:51:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-05-02 22:51:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 53 states have internal predecessors, (54), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:51:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-05-02 22:51:45,299 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 73 [2021-05-02 22:51:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:45,299 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-05-02 22:51:45,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 22:51:45,300 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-05-02 22:51:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 22:51:45,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:45,300 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:45,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:45,513 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:45,513 INFO L82 PathProgramCache]: Analyzing trace with hash -715048783, now seen corresponding path program 9 times [2021-05-02 22:51:45,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:45,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349994411] [2021-05-02 22:51:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:45,519 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:45,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178931211] [2021-05-02 22:51:45,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:45,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 22:51:45,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:45,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 22:51:45,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:45,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:45,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:45,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:45,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:55,788 WARN L205 SmtUtils]: Spent 6.02 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 22:51:55,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:55,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-05-02 22:51:55,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:55,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349994411] [2021-05-02 22:51:55,815 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:55,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178931211] [2021-05-02 22:51:55,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178931211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:55,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:55,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:51:55,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640503046] [2021-05-02 22:51:55,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:51:55,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:55,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:51:55,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=52, Unknown=2, NotChecked=0, Total=72 [2021-05-02 22:51:55,816 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 22:52:52,377 WARN L205 SmtUtils]: Spent 56.55 s on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-02 22:53:17,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:53:17,531 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-05-02 22:53:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:53:17,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 78 [2021-05-02 22:53:17,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:53:17,533 INFO L225 Difference]: With dead ends: 100 [2021-05-02 22:53:17,533 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 22:53:17,533 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 66634.1ms TimeCoverageRelationStatistics Valid=34, Invalid=96, Unknown=2, NotChecked=0, Total=132 [2021-05-02 22:53:17,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 22:53:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 22:53:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 20 states have call successors, (20), 16 states have call predecessors, (20), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:53:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-05-02 22:53:17,536 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 78 [2021-05-02 22:53:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:53:17,536 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-05-02 22:53:17,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 22:53:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-05-02 22:53:17,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 22:53:17,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:53:17,547 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:53:17,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:53:17,757 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:53:17,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:53:17,757 INFO L82 PathProgramCache]: Analyzing trace with hash -782935442, now seen corresponding path program 10 times [2021-05-02 22:53:17,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:53:17,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641178521] [2021-05-02 22:53:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:53:17,762 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:53:17,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756863256] [2021-05-02 22:53:17,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:53:17,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:53:17,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:53:17,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 22:53:17,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:53:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-02 22:53:17,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:53:17,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641178521] [2021-05-02 22:53:17,949 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:53:17,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756863256] [2021-05-02 22:53:17,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756863256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:53:17,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:53:17,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:53:17,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140503814] [2021-05-02 22:53:17,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:53:17,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:53:17,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:53:17,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:53:17,951 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 22:53:18,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:53:18,050 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2021-05-02 22:53:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:53:18,051 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-02 22:53:18,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:53:18,052 INFO L225 Difference]: With dead ends: 108 [2021-05-02 22:53:18,052 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 22:53:18,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:53:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 22:53:18,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-02 22:53:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 67 states have internal predecessors, (68), 24 states have call successors, (24), 18 states have call predecessors, (24), 17 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 22:53:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2021-05-02 22:53:18,058 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 85 [2021-05-02 22:53:18,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:53:18,058 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2021-05-02 22:53:18,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 22:53:18,059 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2021-05-02 22:53:18,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 22:53:18,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:53:18,061 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:53:18,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 22:53:18,282 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:53:18,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:53:18,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1240090109, now seen corresponding path program 11 times [2021-05-02 22:53:18,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:53:18,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535389019] [2021-05-02 22:53:18,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:53:18,300 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:53:18,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052830627] [2021-05-02 22:53:18,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:53:18,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-02 22:53:18,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:53:18,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 22:53:18,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:53:18,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:18,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:18,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:18,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:18,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:18,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:18,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:18,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 59 proven. 99 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-05-02 22:53:18,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:53:18,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535389019] [2021-05-02 22:53:18,613 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:53:18,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052830627] [2021-05-02 22:53:18,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052830627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:53:18,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:53:18,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 22:53:18,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512328732] [2021-05-02 22:53:18,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 22:53:18,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:53:18,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 22:53:18,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:53:18,614 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 22:53:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:53:18,814 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2021-05-02 22:53:18,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 22:53:18,815 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 90 [2021-05-02 22:53:18,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:53:18,816 INFO L225 Difference]: With dead ends: 116 [2021-05-02 22:53:18,816 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 22:53:18,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 22:53:18,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 22:53:18,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-02 22:53:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 69 states have internal predecessors, (70), 23 states have call successors, (23), 19 states have call predecessors, (23), 18 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:53:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-05-02 22:53:18,819 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 90 [2021-05-02 22:53:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:53:18,819 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-05-02 22:53:18,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 22:53:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-05-02 22:53:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 22:53:18,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:53:18,820 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:53:19,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 22:53:19,035 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:53:19,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:53:19,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1053719828, now seen corresponding path program 12 times [2021-05-02 22:53:19,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:53:19,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960840633] [2021-05-02 22:53:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:53:19,040 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:53:19,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081282795] [2021-05-02 22:53:19,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:53:19,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 22:53:19,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:53:19,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 22:53:19,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:53:19,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 85 proven. 68 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2021-05-02 22:53:19,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:53:19,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960840633] [2021-05-02 22:53:19,251 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:53:19,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081282795] [2021-05-02 22:53:19,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081282795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:53:19,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:53:19,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:53:19,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36923585] [2021-05-02 22:53:19,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:53:19,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:53:19,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:53:19,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:53:19,252 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 22:53:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:53:19,320 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2021-05-02 22:53:19,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:53:19,320 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 102 [2021-05-02 22:53:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:53:19,322 INFO L225 Difference]: With dead ends: 118 [2021-05-02 22:53:19,322 INFO L226 Difference]: Without dead ends: 118 [2021-05-02 22:53:19,324 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:53:19,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-02 22:53:19,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-05-02 22:53:19,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 74 states have (on average 1.027027027027027) internal successors, (76), 75 states have internal predecessors, (76), 23 states have call successors, (23), 21 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:53:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2021-05-02 22:53:19,330 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 102 [2021-05-02 22:53:19,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:53:19,331 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2021-05-02 22:53:19,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 22:53:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2021-05-02 22:53:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 22:53:19,334 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:53:19,334 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:53:19,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 22:53:19,551 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:53:19,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:53:19,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2145723625, now seen corresponding path program 13 times [2021-05-02 22:53:19,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:53:19,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774063215] [2021-05-02 22:53:19,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:53:19,556 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:53:19,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512179085] [2021-05-02 22:53:19,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:53:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:53:19,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 22:53:19,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:53:19,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:53:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 135 proven. 20 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2021-05-02 22:53:19,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:53:19,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774063215] [2021-05-02 22:53:19,906 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:53:19,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512179085] [2021-05-02 22:53:19,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512179085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:53:19,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:53:19,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:53:19,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274820594] [2021-05-02 22:53:19,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:53:19,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:53:19,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:53:19,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:53:19,908 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 22:53:19,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:53:19,971 INFO L93 Difference]: Finished difference Result 97 states and 96 transitions. [2021-05-02 22:53:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:53:19,971 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2021-05-02 22:53:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:53:19,972 INFO L225 Difference]: With dead ends: 97 [2021-05-02 22:53:19,972 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 22:53:19,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:53:19,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 22:53:19,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 22:53:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 22:53:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 22:53:19,972 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 107 [2021-05-02 22:53:19,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:53:19,972 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 22:53:19,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 22:53:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 22:53:19,973 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 22:53:20,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:53:20,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:53:20 BasicIcfg [2021-05-02 22:53:20,193 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:53:20,193 INFO L168 Benchmark]: Toolchain (without parser) took 100369.98 ms. Allocated memory was 202.4 MB in the beginning and 264.2 MB in the end (delta: 61.9 MB). Free memory was 168.5 MB in the beginning and 156.2 MB in the end (delta: 12.3 MB). Peak memory consumption was 75.3 MB. Max. memory is 8.0 GB. [2021-05-02 22:53:20,193 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 202.4 MB. Free memory is still 184.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:53:20,193 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.33 ms. Allocated memory is still 202.4 MB. Free memory was 168.3 MB in the beginning and 158.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 22:53:20,193 INFO L168 Benchmark]: Boogie Preprocessor took 53.37 ms. Allocated memory is still 202.4 MB. Free memory was 158.5 MB in the beginning and 186.0 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2021-05-02 22:53:20,193 INFO L168 Benchmark]: RCFGBuilder took 256.18 ms. Allocated memory is still 202.4 MB. Free memory was 186.0 MB in the beginning and 171.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 22:53:20,193 INFO L168 Benchmark]: IcfgTransformer took 13.52 ms. Allocated memory is still 202.4 MB. Free memory was 171.3 MB in the beginning and 170.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:53:20,193 INFO L168 Benchmark]: TraceAbstraction took 99880.69 ms. Allocated memory was 202.4 MB in the beginning and 264.2 MB in the end (delta: 61.9 MB). Free memory was 169.5 MB in the beginning and 156.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 76.1 MB. Max. memory is 8.0 GB. [2021-05-02 22:53:20,194 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 202.4 MB. Free memory is still 184.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 162.33 ms. Allocated memory is still 202.4 MB. Free memory was 168.3 MB in the beginning and 158.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.37 ms. Allocated memory is still 202.4 MB. Free memory was 158.5 MB in the beginning and 186.0 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 256.18 ms. Allocated memory is still 202.4 MB. Free memory was 186.0 MB in the beginning and 171.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.52 ms. Allocated memory is still 202.4 MB. Free memory was 171.3 MB in the beginning and 170.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 99880.69 ms. Allocated memory was 202.4 MB in the beginning and 264.2 MB in the end (delta: 61.9 MB). Free memory was 169.5 MB in the beginning and 156.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 76.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 99848.3ms, OverallIterations: 16, TraceHistogramMax: 17, EmptinessCheckTime: 30.5ms, AutomataDifference: 83375.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 530 SDtfs, 186 SDslu, 2330 SDs, 0 SdLazy, 1940 SolverSat, 191 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 26094.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 942 GetRequests, 805 SyntacticMatches, 6 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 67459.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=15, InterpolantAutomatonStates: 131, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 90.4ms AutomataMinimizationTime, 16 MinimizatonAttempts, 12 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 95.9ms SsaConstructionTime, 406.9ms SatisfiabilityAnalysisTime, 12352.8ms InterpolantComputationTime, 944 NumberOfCodeBlocks, 852 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 928 ConstructedInterpolants, 0 QuantifiedInterpolants, 3016 SizeOfPredicates, 49 NumberOfNonLiveVariables, 2554 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 2517/2911 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...