/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/ps4-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:26:10,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:26:10,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:26:10,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:26:10,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:26:10,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:26:10,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:26:10,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:26:10,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:26:10,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:26:10,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:26:10,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:26:10,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:26:10,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:26:10,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:26:10,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:26:10,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:26:10,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:26:10,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:26:10,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:26:10,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:26:10,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:26:10,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:26:10,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:26:10,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:26:10,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:26:10,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:26:10,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:26:10,976 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:26:10,982 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:26:10,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:26:10,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:26:10,983 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:26:10,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:26:10,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:26:10,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:26:10,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:26:10,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:26:10,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:26:10,984 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:26:10,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:26:10,984 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:26:10,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:26:10,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:26:10,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:26:10,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:26:10,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:26:10,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:26:10,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:26:10,985 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:26:10,986 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:26:10,986 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:26:11,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:26:11,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:26:11,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:26:11,225 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:26:11,225 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:26:11,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound10.c [2021-05-06 10:26:11,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c75da87e/6e30780f967b41c0b315de2c7e9417fd/FLAG283af081f [2021-05-06 10:26:11,610 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:26:11,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound10.c [2021-05-06 10:26:11,614 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c75da87e/6e30780f967b41c0b315de2c7e9417fd/FLAG283af081f [2021-05-06 10:26:11,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c75da87e/6e30780f967b41c0b315de2c7e9417fd [2021-05-06 10:26:11,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:26:11,629 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:26:11,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:26:11,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:26:11,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:26:11,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:26:11" (1/1) ... [2021-05-06 10:26:11,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb35fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:11, skipping insertion in model container [2021-05-06 10:26:11,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:26:11" (1/1) ... [2021-05-06 10:26:11,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:26:11,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:26:11,751 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/ps4-ll_valuebound10.c[458,471] [2021-05-06 10:26:11,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:26:11,767 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:26:11,790 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/ps4-ll_valuebound10.c[458,471] [2021-05-06 10:26:11,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:26:11,816 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:26:11,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:11 WrapperNode [2021-05-06 10:26:11,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:26:11,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:26:11,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:26:11,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:26:11,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:11" (1/1) ... [2021-05-06 10:26:11,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:11" (1/1) ... [2021-05-06 10:26:11,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:11" (1/1) ... [2021-05-06 10:26:11,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:11" (1/1) ... [2021-05-06 10:26:11,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:11" (1/1) ... [2021-05-06 10:26:11,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:11" (1/1) ... [2021-05-06 10:26:11,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:11" (1/1) ... [2021-05-06 10:26:11,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:26:11,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:26:11,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:26:11,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:26:11,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:26:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:26:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:26:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:26:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:26:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:26:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:26:11,922 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:26:11,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:26:11,922 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:26:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:26:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:26:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:26:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:26:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:26:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:26:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:26:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:26:11,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:26:11,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:26:11,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:26:12,132 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:26:12,132 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:26:12,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:26:12 BoogieIcfgContainer [2021-05-06 10:26:12,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:26:12,133 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:26:12,133 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:26:12,134 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:26:12,135 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:26:12" (1/1) ... [2021-05-06 10:26:12,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:26:12 BasicIcfg [2021-05-06 10:26:12,153 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:26:12,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:26:12,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:26:12,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:26:12,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:26:11" (1/4) ... [2021-05-06 10:26:12,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585ec814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:26:12, skipping insertion in model container [2021-05-06 10:26:12,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:26:11" (2/4) ... [2021-05-06 10:26:12,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585ec814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:26:12, skipping insertion in model container [2021-05-06 10:26:12,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:26:12" (3/4) ... [2021-05-06 10:26:12,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585ec814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:26:12, skipping insertion in model container [2021-05-06 10:26:12,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:26:12" (4/4) ... [2021-05-06 10:26:12,158 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound10.cJordan [2021-05-06 10:26:12,174 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:26:12,176 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:26:12,187 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:26:12,204 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:26:12,204 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:26:12,204 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:26:12,204 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:26:12,204 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:26:12,204 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:26:12,205 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:26:12,205 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:26:12,215 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:26:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:26:12,220 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:12,220 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:12,221 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:12,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:12,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1885409022, now seen corresponding path program 1 times [2021-05-06 10:26:12,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:12,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157944354] [2021-05-06 10:26:12,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:26:12,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:26:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:26:12,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:26:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:26:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:26:12,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:12,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157944354] [2021-05-06 10:26:12,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157944354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:26:12,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:26:12,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:26:12,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861025118] [2021-05-06 10:26:12,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:26:12,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:12,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:26:12,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:26:12,442 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 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) [2021-05-06 10:26:12,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:12,495 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-05-06 10:26:12,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:26:12,497 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 [2021-05-06 10:26:12,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:12,501 INFO L225 Difference]: With dead ends: 28 [2021-05-06 10:26:12,501 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 10:26:12,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:26:12,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 10:26:12,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 10:26:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:26:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-05-06 10:26:12,521 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2021-05-06 10:26:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:12,521 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-05-06 10:26:12,522 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) [2021-05-06 10:26:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-05-06 10:26:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:26:12,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:12,522 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:12,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:26:12,523 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:12,523 INFO L82 PathProgramCache]: Analyzing trace with hash 603980644, now seen corresponding path program 1 times [2021-05-06 10:26:12,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:12,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792836652] [2021-05-06 10:26:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:12,532 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:12,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325223618] [2021-05-06 10:26:12,533 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 [2021-05-06 10:26:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:26:12,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:26:12,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:12,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:26:12,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:12,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792836652] [2021-05-06 10:26:12,649 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:12,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325223618] [2021-05-06 10:26:12,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325223618] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:26:12,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:26:12,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:26:12,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616228355] [2021-05-06 10:26:12,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:26:12,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:12,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:26:12,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:26:12,651 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:26:12,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:12,679 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-06 10:26:12,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:26:12,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 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 [2021-05-06 10:26:12,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:12,680 INFO L225 Difference]: With dead ends: 32 [2021-05-06 10:26:12,680 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 10:26:12,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:26:12,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 10:26:12,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 10:26:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:26:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-06 10:26:12,685 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2021-05-06 10:26:12,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:12,685 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-06 10:26:12,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:26:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-06 10:26:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 10:26:12,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:12,686 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:12,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:26:12,903 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:12,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:12,903 INFO L82 PathProgramCache]: Analyzing trace with hash -169450186, now seen corresponding path program 1 times [2021-05-06 10:26:12,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:12,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177540811] [2021-05-06 10:26:12,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:12,912 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:12,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800974236] [2021-05-06 10:26:12,913 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 [2021-05-06 10:26:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:26:12,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:26:12,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:13,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:26:13,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:13,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177540811] [2021-05-06 10:26:13,049 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:13,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800974236] [2021-05-06 10:26:13,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800974236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:13,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:13,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:26:13,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243603602] [2021-05-06 10:26:13,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:26:13,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:13,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:26:13,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:26:13,051 INFO L87 Difference]: Start difference. First operand 30 states and 32 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:26:13,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:13,089 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-05-06 10:26:13,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:26:13,090 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 10:26:13,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:13,090 INFO L225 Difference]: With dead ends: 39 [2021-05-06 10:26:13,090 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 10:26:13,091 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:26:13,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 10:26:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 10:26:13,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:26:13,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 10:26:13,103 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2021-05-06 10:26:13,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:13,103 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 10:26:13,103 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:26:13,103 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 10:26:13,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 10:26:13,104 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:13,104 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:13,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:13,320 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:13,321 INFO L82 PathProgramCache]: Analyzing trace with hash -434891502, now seen corresponding path program 1 times [2021-05-06 10:26:13,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:13,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823836392] [2021-05-06 10:26:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:13,327 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:13,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649865554] [2021-05-06 10:26:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:26:13,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:26:13,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:13,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:13,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:13,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:13,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:13,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:13,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:13,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:13,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:13,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:26:13,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:13,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823836392] [2021-05-06 10:26:13,574 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:13,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649865554] [2021-05-06 10:26:13,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649865554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:13,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:13,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:26:13,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137479104] [2021-05-06 10:26:13,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:26:13,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:13,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:26:13,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:26:13,575 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:26:13,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:13,619 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-06 10:26:13,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:26:13,619 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-05-06 10:26:13,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:13,620 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:26:13,620 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 10:26:13,620 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:26:13,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 10:26:13,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 10:26:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:26:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-05-06 10:26:13,623 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2021-05-06 10:26:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:13,624 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-05-06 10:26:13,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:26:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-05-06 10:26:13,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 10:26:13,624 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:13,624 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:13,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:13,843 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:13,844 INFO L82 PathProgramCache]: Analyzing trace with hash -570969308, now seen corresponding path program 2 times [2021-05-06 10:26:13,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:13,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685663701] [2021-05-06 10:26:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:13,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:13,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114037350] [2021-05-06 10:26:13,851 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 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 [2021-05-06 10:26:13,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:26:13,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:26:13,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:26:13,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:13,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:26:13,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:13,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685663701] [2021-05-06 10:26:13,994 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:13,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114037350] [2021-05-06 10:26:13,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114037350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:13,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:13,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:26:13,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619351957] [2021-05-06 10:26:13,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:26:13,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:13,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:26:13,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:26:13,995 INFO L87 Difference]: Start difference. First operand 37 states and 39 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:26:20,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:20,698 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-05-06 10:26:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:26:20,699 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-06 10:26:20,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:20,700 INFO L225 Difference]: With dead ends: 46 [2021-05-06 10:26:20,700 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 10:26:20,700 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:26:20,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 10:26:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 10:26:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:26:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-05-06 10:26:20,703 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 31 [2021-05-06 10:26:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:20,704 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-05-06 10:26:20,704 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:26:20,704 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-05-06 10:26:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 10:26:20,705 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:20,705 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:20,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:20,917 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:20,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:20,917 INFO L82 PathProgramCache]: Analyzing trace with hash 725792896, now seen corresponding path program 2 times [2021-05-06 10:26:20,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:20,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634814918] [2021-05-06 10:26:20,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:20,926 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:20,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10810673] [2021-05-06 10:26:20,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:20,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:26:20,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:26:20,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 10:26:20,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:21,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:26:21,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:21,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634814918] [2021-05-06 10:26:21,148 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:21,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10810673] [2021-05-06 10:26:21,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10810673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:21,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:21,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:26:21,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269990311] [2021-05-06 10:26:21,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:26:21,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:21,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:26:21,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:26:21,149 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:26:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:21,200 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-05-06 10:26:21,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:26:21,200 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-06 10:26:21,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:21,201 INFO L225 Difference]: With dead ends: 49 [2021-05-06 10:26:21,201 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 10:26:21,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:26:21,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 10:26:21,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 10:26:21,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:26:21,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-05-06 10:26:21,204 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-05-06 10:26:21,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:21,205 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-05-06 10:26:21,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:26:21,205 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-05-06 10:26:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 10:26:21,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:21,206 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:21,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 10:26:21,423 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:21,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:21,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1050508662, now seen corresponding path program 3 times [2021-05-06 10:26:21,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:21,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78891248] [2021-05-06 10:26:21,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:21,430 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:21,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775592139] [2021-05-06 10:26:21,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:21,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:26:21,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:26:21,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:26:21,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:21,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-06 10:26:21,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:21,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78891248] [2021-05-06 10:26:21,555 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:21,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775592139] [2021-05-06 10:26:21,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775592139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:21,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:21,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:26:21,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572933949] [2021-05-06 10:26:21,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:26:21,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:21,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:26:21,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:26:21,556 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:26:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:21,610 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-05-06 10:26:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:26:21,611 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-05-06 10:26:21,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:21,611 INFO L225 Difference]: With dead ends: 48 [2021-05-06 10:26:21,611 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 10:26:21,612 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:26:21,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 10:26:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 10:26:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:26:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-06 10:26:21,614 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 38 [2021-05-06 10:26:21,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:21,615 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-06 10:26:21,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:26:21,615 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-06 10:26:21,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 10:26:21,615 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:21,615 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:21,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:21,833 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:21,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1487404370, now seen corresponding path program 3 times [2021-05-06 10:26:21,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:21,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530666160] [2021-05-06 10:26:21,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:21,845 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:21,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178079797] [2021-05-06 10:26:21,845 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 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 [2021-05-06 10:26:21,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 10:26:21,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:26:21,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:26:21,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:21,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:21,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:22,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 10:26:22,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:22,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530666160] [2021-05-06 10:26:22,027 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:22,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178079797] [2021-05-06 10:26:22,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178079797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:22,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:22,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:26:22,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152516284] [2021-05-06 10:26:22,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:26:22,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:22,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:26:22,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:26:22,028 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 10:26:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:22,087 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-05-06 10:26:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:26:22,087 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2021-05-06 10:26:22,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:22,088 INFO L225 Difference]: With dead ends: 51 [2021-05-06 10:26:22,088 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 10:26:22,088 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:26:22,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 10:26:22,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-06 10:26:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:26:22,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-05-06 10:26:22,091 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2021-05-06 10:26:22,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:22,091 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-05-06 10:26:22,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 10:26:22,092 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-05-06 10:26:22,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 10:26:22,092 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:22,092 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:22,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:26:22,312 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:22,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:22,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1178929216, now seen corresponding path program 4 times [2021-05-06 10:26:22,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:22,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599660312] [2021-05-06 10:26:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:22,318 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:22,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835676692] [2021-05-06 10:26:22,318 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 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 [2021-05-06 10:26:22,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:26:22,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:26:22,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:26:22,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:22,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:22,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:22,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:22,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:22,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:22,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:22,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:22,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:22,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 10:26:22,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:22,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599660312] [2021-05-06 10:26:22,506 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:22,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835676692] [2021-05-06 10:26:22,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835676692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:22,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:22,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:26:22,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293553353] [2021-05-06 10:26:22,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:26:22,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:22,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:26:22,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:26:22,507 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 10:26:22,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:22,573 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-05-06 10:26:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:26:22,574 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2021-05-06 10:26:22,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:22,574 INFO L225 Difference]: With dead ends: 54 [2021-05-06 10:26:22,574 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 10:26:22,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:26:22,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 10:26:22,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-06 10:26:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:26:22,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-05-06 10:26:22,577 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 51 [2021-05-06 10:26:22,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:22,578 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-05-06 10:26:22,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 10:26:22,578 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-05-06 10:26:22,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 10:26:22,578 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:22,578 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:22,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 10:26:22,784 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:22,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1658817134, now seen corresponding path program 5 times [2021-05-06 10:26:22,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:22,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079432050] [2021-05-06 10:26:22,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:22,792 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:22,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341528215] [2021-05-06 10:26:22,792 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 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 [2021-05-06 10:26:22,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 10:26:22,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:26:22,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 10:26:22,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:22,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:22,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:22,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:22,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:23,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:23,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:23,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:23,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:23,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 10:26:23,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:23,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079432050] [2021-05-06 10:26:23,047 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:23,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341528215] [2021-05-06 10:26:23,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341528215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:23,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:23,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:26:23,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929955163] [2021-05-06 10:26:23,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:26:23,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:23,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:26:23,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:26:23,048 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 10:26:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:23,126 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-05-06 10:26:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 10:26:23,127 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2021-05-06 10:26:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:23,127 INFO L225 Difference]: With dead ends: 57 [2021-05-06 10:26:23,127 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 10:26:23,128 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:26:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 10:26:23,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 10:26:23,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:26:23,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-05-06 10:26:23,131 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 58 [2021-05-06 10:26:23,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:23,131 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-05-06 10:26:23,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 10:26:23,131 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-05-06 10:26:23,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 10:26:23,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:23,132 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:23,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:23,349 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:23,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:23,349 INFO L82 PathProgramCache]: Analyzing trace with hash 270583808, now seen corresponding path program 6 times [2021-05-06 10:26:23,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:23,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991871509] [2021-05-06 10:26:23,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:23,355 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:23,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480981863] [2021-05-06 10:26:23,355 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 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 [2021-05-06 10:26:23,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 10:26:23,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:26:23,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 10:26:23,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:23,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:23,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:23,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:23,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:23,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:23,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:23,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:23,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:23,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 10:26:23,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:23,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991871509] [2021-05-06 10:26:23,702 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:23,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480981863] [2021-05-06 10:26:23,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480981863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:23,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:23,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 10:26:23,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672283513] [2021-05-06 10:26:23,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 10:26:23,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:23,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 10:26:23,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:26:23,703 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 10:26:23,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:23,794 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-05-06 10:26:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 10:26:23,795 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2021-05-06 10:26:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:23,795 INFO L225 Difference]: With dead ends: 60 [2021-05-06 10:26:23,795 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 10:26:23,796 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:26:23,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 10:26:23,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-06 10:26:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:26:23,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-05-06 10:26:23,799 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 65 [2021-05-06 10:26:23,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:23,799 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-05-06 10:26:23,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 10:26:23,799 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-05-06 10:26:23,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 10:26:23,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:23,800 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:24,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 10:26:24,003 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:24,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:24,003 INFO L82 PathProgramCache]: Analyzing trace with hash 4292050, now seen corresponding path program 7 times [2021-05-06 10:26:24,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:24,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215044084] [2021-05-06 10:26:24,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:24,013 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:24,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130249796] [2021-05-06 10:26:24,014 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 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 [2021-05-06 10:26:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:26:24,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 10:26:24,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:24,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:24,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:24,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:24,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:24,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:24,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:24,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:24,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:24,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 92 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-06 10:26:24,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:24,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215044084] [2021-05-06 10:26:24,547 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:24,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130249796] [2021-05-06 10:26:24,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130249796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:24,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:24,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 10:26:24,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858752101] [2021-05-06 10:26:24,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 10:26:24,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:24,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 10:26:24,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-05-06 10:26:24,548 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 10:26:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:24,728 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2021-05-06 10:26:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 10:26:24,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 72 [2021-05-06 10:26:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:24,729 INFO L225 Difference]: With dead ends: 67 [2021-05-06 10:26:24,729 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 10:26:24,730 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-06 10:26:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 10:26:24,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 10:26:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:26:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-05-06 10:26:24,733 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 72 [2021-05-06 10:26:24,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:24,733 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-05-06 10:26:24,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 10:26:24,733 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-05-06 10:26:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 10:26:24,734 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:24,734 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:24,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 10:26:24,942 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:24,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:24,942 INFO L82 PathProgramCache]: Analyzing trace with hash 395442112, now seen corresponding path program 8 times [2021-05-06 10:26:24,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:24,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629267891] [2021-05-06 10:26:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:24,947 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:24,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097193990] [2021-05-06 10:26:24,947 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 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 [2021-05-06 10:26:25,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:26:25,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:26:25,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 10:26:25,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:25,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:25,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:25,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:25,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:25,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:25,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:25,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:25,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:25,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 10:26:25,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:25,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629267891] [2021-05-06 10:26:25,651 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:25,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097193990] [2021-05-06 10:26:25,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097193990] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:25,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:25,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 10:26:25,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279861813] [2021-05-06 10:26:25,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 10:26:25,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:25,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 10:26:25,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:26:25,653 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 10:26:25,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:25,802 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2021-05-06 10:26:25,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 10:26:25,802 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 79 [2021-05-06 10:26:25,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:25,803 INFO L225 Difference]: With dead ends: 70 [2021-05-06 10:26:25,803 INFO L226 Difference]: Without dead ends: 67 [2021-05-06 10:26:25,803 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-05-06 10:26:25,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-06 10:26:25,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-06 10:26:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 14 states have call successors, (14), 9 states have call predecessors, (14), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:26:25,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2021-05-06 10:26:25,806 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 79 [2021-05-06 10:26:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:25,806 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2021-05-06 10:26:25,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 10:26:25,807 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2021-05-06 10:26:25,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 10:26:25,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:25,807 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:26,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:26,013 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:26,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:26,014 INFO L82 PathProgramCache]: Analyzing trace with hash 667883026, now seen corresponding path program 9 times [2021-05-06 10:26:26,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:26,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819303790] [2021-05-06 10:26:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:26,019 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:26,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975457527] [2021-05-06 10:26:26,019 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 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 [2021-05-06 10:26:26,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 10:26:26,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:26:26,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 10:26:26,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:26,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:26,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:26,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:26,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:26,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:26,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:26,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:26,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:26,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 10:26:26,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:26,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819303790] [2021-05-06 10:26:26,707 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:26,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975457527] [2021-05-06 10:26:26,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975457527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:26,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:26,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 10:26:26,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990553032] [2021-05-06 10:26:26,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 10:26:26,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:26,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 10:26:26,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-05-06 10:26:26,708 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 10:26:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:26,889 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2021-05-06 10:26:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 10:26:26,889 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 86 [2021-05-06 10:26:26,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:26,890 INFO L225 Difference]: With dead ends: 73 [2021-05-06 10:26:26,890 INFO L226 Difference]: Without dead ends: 70 [2021-05-06 10:26:26,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-06 10:26:26,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-06 10:26:26,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-06 10:26:26,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:26:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-05-06 10:26:26,893 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 86 [2021-05-06 10:26:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:26,893 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-05-06 10:26:26,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 10:26:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-05-06 10:26:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 10:26:26,894 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:26,894 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:27,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 10:26:27,094 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:27,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1918146432, now seen corresponding path program 10 times [2021-05-06 10:26:27,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:27,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276687563] [2021-05-06 10:26:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:27,099 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:27,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269565417] [2021-05-06 10:26:27,099 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 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 [2021-05-06 10:26:27,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:26:27,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:26:27,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-06 10:26:27,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:27,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:27,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:27,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:27,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:27,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:27,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:27,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:27,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:27,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 10:26:27,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:27,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276687563] [2021-05-06 10:26:27,963 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:27,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269565417] [2021-05-06 10:26:27,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269565417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:26:27,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:26:27,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 10:26:27,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896203318] [2021-05-06 10:26:27,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 10:26:27,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:27,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 10:26:27,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-05-06 10:26:27,965 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 10:26:28,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:28,170 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-05-06 10:26:28,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 10:26:28,170 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 93 [2021-05-06 10:26:28,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:28,171 INFO L225 Difference]: With dead ends: 76 [2021-05-06 10:26:28,171 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 10:26:28,171 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-06 10:26:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 10:26:28,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-06 10:26:28,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 16 states have call successors, (16), 9 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:26:28,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2021-05-06 10:26:28,174 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 93 [2021-05-06 10:26:28,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:28,174 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2021-05-06 10:26:28,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 10:26:28,174 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2021-05-06 10:26:28,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 10:26:28,174 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:26:28,175 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:26:28,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:28,375 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:26:28,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:26:28,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1384988242, now seen corresponding path program 11 times [2021-05-06 10:26:28,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:26:28,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767756678] [2021-05-06 10:26:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:26:28,387 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:26:28,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151717714] [2021-05-06 10:26:28,387 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:26:28,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 10:26:28,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:26:28,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 10:26:28,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:26:28,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:26:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-05-06 10:26:28,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:26:28,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767756678] [2021-05-06 10:26:28,953 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:26:28,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151717714] [2021-05-06 10:26:28,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151717714] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:26:28,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:26:28,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-06 10:26:28,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346750242] [2021-05-06 10:26:28,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 10:26:28,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:26:28,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 10:26:28,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-05-06 10:26:28,955 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 10:26:29,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:26:29,014 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2021-05-06 10:26:29,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 10:26:29,015 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 100 [2021-05-06 10:26:29,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:26:29,015 INFO L225 Difference]: With dead ends: 65 [2021-05-06 10:26:29,015 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 10:26:29,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-05-06 10:26:29,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 10:26:29,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 10:26:29,015 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) [2021-05-06 10:26:29,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 10:26:29,016 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2021-05-06 10:26:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:26:29,016 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 10:26:29,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 10:26:29,016 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 10:26:29,016 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 10:26:29,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 10:26:29,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:26:29 BasicIcfg [2021-05-06 10:26:29,225 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:26:29,225 INFO L168 Benchmark]: Toolchain (without parser) took 17596.07 ms. Allocated memory was 182.5 MB in the beginning and 219.2 MB in the end (delta: 36.7 MB). Free memory was 146.9 MB in the beginning and 126.5 MB in the end (delta: 20.4 MB). Peak memory consumption was 58.2 MB. Max. memory is 8.0 GB. [2021-05-06 10:26:29,225 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 182.5 MB. Free memory is still 163.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:26:29,225 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.03 ms. Allocated memory is still 182.5 MB. Free memory was 146.8 MB in the beginning and 164.9 MB in the end (delta: -18.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:26:29,225 INFO L168 Benchmark]: Boogie Preprocessor took 31.94 ms. Allocated memory is still 182.5 MB. Free memory was 164.9 MB in the beginning and 163.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:26:29,225 INFO L168 Benchmark]: RCFGBuilder took 283.13 ms. Allocated memory is still 182.5 MB. Free memory was 163.3 MB in the beginning and 148.6 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 10:26:29,225 INFO L168 Benchmark]: IcfgTransformer took 20.28 ms. Allocated memory is still 182.5 MB. Free memory was 148.6 MB in the beginning and 147.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:26:29,225 INFO L168 Benchmark]: TraceAbstraction took 17070.39 ms. Allocated memory was 182.5 MB in the beginning and 219.2 MB in the end (delta: 36.7 MB). Free memory was 146.5 MB in the beginning and 126.5 MB in the end (delta: 20.0 MB). Peak memory consumption was 58.7 MB. Max. memory is 8.0 GB. [2021-05-06 10:26:29,226 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 182.5 MB. Free memory is still 163.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 184.03 ms. Allocated memory is still 182.5 MB. Free memory was 146.8 MB in the beginning and 164.9 MB in the end (delta: -18.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.94 ms. Allocated memory is still 182.5 MB. Free memory was 164.9 MB in the beginning and 163.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 283.13 ms. Allocated memory is still 182.5 MB. Free memory was 163.3 MB in the beginning and 148.6 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 20.28 ms. Allocated memory is still 182.5 MB. Free memory was 148.6 MB in the beginning and 147.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17070.39 ms. Allocated memory was 182.5 MB in the beginning and 219.2 MB in the end (delta: 36.7 MB). Free memory was 146.5 MB in the beginning and 126.5 MB in the end (delta: 20.0 MB). Peak memory consumption was 58.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17019.5ms, OverallIterations: 16, TraceHistogramMax: 13, EmptinessCheckTime: 16.8ms, AutomataDifference: 8084.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 545 SDtfs, 86 SDslu, 3519 SDs, 0 SdLazy, 2019 SolverSat, 31 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 7521.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 844 GetRequests, 686 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1160.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=15, InterpolantAutomatonStates: 162, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 61.8ms AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 134.2ms SsaConstructionTime, 2316.6ms SatisfiabilityAnalysisTime, 2554.2ms InterpolantComputationTime, 842 NumberOfCodeBlocks, 824 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 826 ConstructedInterpolants, 0 QuantifiedInterpolants, 2821 SizeOfPredicates, 30 NumberOfNonLiveVariables, 2764 ConjunctsInSsa, 376 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 1530/2208 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...