/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:45:39,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:45:39,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:45:39,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:45:39,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:45:39,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:45:39,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:45:40,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:45:40,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:45:40,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:45:40,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:45:40,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:45:40,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:45:40,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:45:40,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:45:40,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:45:40,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:45:40,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:45:40,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:45:40,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:45:40,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:45:40,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:45:40,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:45:40,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:45:40,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:45:40,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:45:40,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:45:40,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:45:40,063 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:45:40,078 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:45:40,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:45:40,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:45:40,081 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:45:40,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:45:40,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:45:40,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:45:40,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:45:40,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:45:40,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:45:40,083 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:45:40,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:45:40,084 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:45:40,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:45:40,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:45:40,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:45:40,084 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:45:40,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:45:40,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:45:40,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:45:40,085 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:45:40,086 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:45:40,086 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:45:40,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:45:40,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:45:40,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:45:40,414 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:45:40,414 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:45:40,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound10.c [2021-05-02 20:45:40,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69a9248c7/5d7dc43a1b4d48c3a3df0f75d7032062/FLAG5be7e631c [2021-05-02 20:45:40,859 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:45:40,859 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound10.c [2021-05-02 20:45:40,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69a9248c7/5d7dc43a1b4d48c3a3df0f75d7032062/FLAG5be7e631c [2021-05-02 20:45:40,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69a9248c7/5d7dc43a1b4d48c3a3df0f75d7032062 [2021-05-02 20:45:40,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:45:40,884 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:45:40,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:45:40,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:45:40,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:45:40,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:45:40" (1/1) ... [2021-05-02 20:45:40,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742637d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:40, skipping insertion in model container [2021-05-02 20:45:40,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:45:40" (1/1) ... [2021-05-02 20:45:40,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:45:40,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:45:41,054 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound10.c[524,537] [2021-05-02 20:45:41,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:45:41,108 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:45:41,136 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound10.c[524,537] [2021-05-02 20:45:41,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:45:41,166 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:45:41,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:41 WrapperNode [2021-05-02 20:45:41,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:45:41,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:45:41,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:45:41,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:45:41,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:41" (1/1) ... [2021-05-02 20:45:41,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:41" (1/1) ... [2021-05-02 20:45:41,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:41" (1/1) ... [2021-05-02 20:45:41,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:41" (1/1) ... [2021-05-02 20:45:41,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:41" (1/1) ... [2021-05-02 20:45:41,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:41" (1/1) ... [2021-05-02 20:45:41,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:41" (1/1) ... [2021-05-02 20:45:41,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:45:41,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:45:41,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:45:41,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:45:41,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:45:41,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:45:41,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:45:41,289 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:45:41,290 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:45:41,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:45:41,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:45:41,290 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:45:41,290 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:45:41,290 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:45:41,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:45:41,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:45:41,291 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:45:41,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:45:41,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:45:41,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:45:41,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:45:41,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:45:41,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:45:41,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:45:41,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:45:41,591 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:45:41,591 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:45:41,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:45:41 BoogieIcfgContainer [2021-05-02 20:45:41,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:45:41,595 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:45:41,595 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:45:41,596 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:45:41,598 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:45:41" (1/1) ... [2021-05-02 20:45:41,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:45:41 BasicIcfg [2021-05-02 20:45:41,615 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:45:41,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:45:41,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:45:41,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:45:41,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:45:40" (1/4) ... [2021-05-02 20:45:41,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb61321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:45:41, skipping insertion in model container [2021-05-02 20:45:41,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:45:41" (2/4) ... [2021-05-02 20:45:41,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb61321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:45:41, skipping insertion in model container [2021-05-02 20:45:41,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:45:41" (3/4) ... [2021-05-02 20:45:41,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb61321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:45:41, skipping insertion in model container [2021-05-02 20:45:41,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:45:41" (4/4) ... [2021-05-02 20:45:41,626 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound10.cJordan [2021-05-02 20:45:41,630 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:45:41,633 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:45:41,646 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:45:41,669 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:45:41,669 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:45:41,669 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:45:41,669 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:45:41,669 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:45:41,670 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:45:41,670 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:45:41,670 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:45:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:45:41,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:45:41,688 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:41,688 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:41,689 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:41,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:41,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1450325676, now seen corresponding path program 1 times [2021-05-02 20:45:41,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:41,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477610728] [2021-05-02 20:45:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:41,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:45:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:41,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:45:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:41,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:45:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:41,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:45:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:41,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:45:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:45:41,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:41,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477610728] [2021-05-02 20:45:41,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477610728] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:45:41,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:45:41,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:45:41,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463547604] [2021-05-02 20:45:41,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:45:41,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:41,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:45:41,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:45:41,991 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:45:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:42,077 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-05-02 20:45:42,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:45:42,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:45:42,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:42,085 INFO L225 Difference]: With dead ends: 32 [2021-05-02 20:45:42,085 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:45:42,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:45:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:45:42,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:45:42,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:45:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-05-02 20:45:42,118 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 33 [2021-05-02 20:45:42,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:42,118 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-05-02 20:45:42,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:45:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-05-02 20:45:42,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:45:42,120 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:42,121 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:42,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:45:42,121 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:42,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:42,122 INFO L82 PathProgramCache]: Analyzing trace with hash 512475503, now seen corresponding path program 1 times [2021-05-02 20:45:42,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:42,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183965438] [2021-05-02 20:45:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:42,150 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:42,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169904202] [2021-05-02 20:45:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:42,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:45:42,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:42,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:42,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:42,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:42,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:42,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:42,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:42,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:42,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:45:42,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:42,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183965438] [2021-05-02 20:45:42,693 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:42,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169904202] [2021-05-02 20:45:42,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169904202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:45:42,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:45:42,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:45:42,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175720284] [2021-05-02 20:45:42,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:45:42,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:42,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:45:42,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:45:42,696 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:45:42,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:42,813 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-05-02 20:45:42,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:45:42,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:45:42,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:42,815 INFO L225 Difference]: With dead ends: 36 [2021-05-02 20:45:42,816 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 20:45:42,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:45:42,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 20:45:42,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 20:45:42,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:45:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-05-02 20:45:42,821 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 33 [2021-05-02 20:45:42,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:42,822 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-05-02 20:45:42,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:45:42,823 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-05-02 20:45:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:45:42,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:42,824 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:43,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:45:43,026 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:43,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:43,027 INFO L82 PathProgramCache]: Analyzing trace with hash -397056057, now seen corresponding path program 1 times [2021-05-02 20:45:43,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:43,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346710996] [2021-05-02 20:45:43,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:43,038 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:43,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295102763] [2021-05-02 20:45:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:43,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:45:43,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:43,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:43,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:43,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:43,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:43,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:43,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:43,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:43,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:43,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:43,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:45:43,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:43,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346710996] [2021-05-02 20:45:43,457 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:43,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295102763] [2021-05-02 20:45:43,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295102763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:45:43,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:45:43,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:45:43,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756320837] [2021-05-02 20:45:43,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:45:43,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:43,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:45:43,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:45:43,461 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:45:49,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:49,697 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-05-02 20:45:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:45:49,700 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-05-02 20:45:49,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:49,701 INFO L225 Difference]: With dead ends: 39 [2021-05-02 20:45:49,701 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:45:49,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 159.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:45:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:45:49,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 20:45:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:45:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-05-02 20:45:49,710 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 39 [2021-05-02 20:45:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:49,711 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-05-02 20:45:49,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:45:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-05-02 20:45:49,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:45:49,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:49,712 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:49,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:49,913 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:49,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1822507357, now seen corresponding path program 1 times [2021-05-02 20:45:49,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:49,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621979721] [2021-05-02 20:45:49,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:49,921 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:49,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592353997] [2021-05-02 20:45:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:50,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:45:50,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:50,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:50,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:50,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:50,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:50,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:50,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:50,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:50,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:50,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:50,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:45:50,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:50,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621979721] [2021-05-02 20:45:50,204 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:50,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592353997] [2021-05-02 20:45:50,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592353997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:45:50,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:45:50,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:45:50,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762346243] [2021-05-02 20:45:50,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:45:50,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:50,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:45:50,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:45:50,206 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:45:52,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:52,478 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-05-02 20:45:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:45:52,479 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 20:45:52,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:52,481 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:45:52,481 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 20:45:52,481 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:45:52,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 20:45:52,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-05-02 20:45:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:45:52,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-05-02 20:45:52,489 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 41 [2021-05-02 20:45:52,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:52,490 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-05-02 20:45:52,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:45:52,490 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-05-02 20:45:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 20:45:52,491 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:52,491 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:52,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:52,697 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:52,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:52,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1603865781, now seen corresponding path program 2 times [2021-05-02 20:45:52,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:52,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958184440] [2021-05-02 20:45:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:52,711 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:52,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751108950] [2021-05-02 20:45:52,711 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 [2021-05-02 20:45:52,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:45:52,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:45:52,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:45:52,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:52,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:52,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:52,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:52,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:52,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:52,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:52,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:52,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:52,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:52,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:53,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:53,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:45:53,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:53,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958184440] [2021-05-02 20:45:53,047 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:53,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751108950] [2021-05-02 20:45:53,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751108950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:45:53,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:45:53,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:45:53,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282066395] [2021-05-02 20:45:53,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:45:53,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:53,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:45:53,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:45:53,049 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:45:55,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:55,346 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-05-02 20:45:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:45:55,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 49 [2021-05-02 20:45:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:55,348 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:45:55,348 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 20:45:55,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:45:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 20:45:55,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2021-05-02 20:45:55,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:45:55,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-05-02 20:45:55,354 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 49 [2021-05-02 20:45:55,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:55,354 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-05-02 20:45:55,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:45:55,354 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-05-02 20:45:55,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 20:45:55,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:55,356 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:55,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:55,577 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:55,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:55,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1737152313, now seen corresponding path program 3 times [2021-05-02 20:45:55,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:55,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223142295] [2021-05-02 20:45:55,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:55,585 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:55,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645284316] [2021-05-02 20:45:55,585 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:55,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:45:55,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:45:55,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:45:55,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:55,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:55,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-02 20:45:55,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:55,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223142295] [2021-05-02 20:45:55,783 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:55,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645284316] [2021-05-02 20:45:55,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645284316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:45:55,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:45:55,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:45:55,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662458651] [2021-05-02 20:45:55,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:45:55,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:55,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:45:55,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:45:55,785 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 20:46:05,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:46:05,978 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-05-02 20:46:05,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:46:05,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 57 [2021-05-02 20:46:05,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:46:05,979 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:46:05,980 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:46:05,980 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:46:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:46:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2021-05-02 20:46:05,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:46:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-05-02 20:46:05,986 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 57 [2021-05-02 20:46:05,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:46:05,986 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-05-02 20:46:05,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 20:46:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-05-02 20:46:05,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 20:46:05,987 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:46:05,987 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:46:06,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:46:06,209 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:46:06,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:46:06,210 INFO L82 PathProgramCache]: Analyzing trace with hash -479214138, now seen corresponding path program 1 times [2021-05-02 20:46:06,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:46:06,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390924747] [2021-05-02 20:46:06,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:46:06,223 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:46:06,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230819163] [2021-05-02 20:46:06,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:46:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:46:06,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 20:46:06,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:46:06,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:06,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:06,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:06,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:06,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:06,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:06,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:06,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:39,091 WARN L205 SmtUtils]: Spent 30.62 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 20:46:45,657 WARN L205 SmtUtils]: Spent 6.51 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 20:46:45,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:51,876 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 20:46:51,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:51,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:51,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:51,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:51,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:51,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:51,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:51,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:03,852 WARN L205 SmtUtils]: Spent 8.35 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:47:41,351 WARN L205 SmtUtils]: Spent 16.98 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 20:47:41,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:41,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 41 refuted. 4 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 20:47:41,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:41,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390924747] [2021-05-02 20:47:41,449 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:41,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230819163] [2021-05-02 20:47:41,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230819163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:47:41,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:47:41,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:47:41,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343176539] [2021-05-02 20:47:41,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:47:41,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:41,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:47:41,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=163, Unknown=8, NotChecked=0, Total=210 [2021-05-02 20:47:41,451 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:48:34,256 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 20:48:44,386 WARN L205 SmtUtils]: Spent 10.06 s on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 20:49:00,738 WARN L205 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 20:50:05,277 WARN L205 SmtUtils]: Spent 16.47 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 20:50:07,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:07,302 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2021-05-02 20:50:07,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:50:07,316 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 65 [2021-05-02 20:50:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:07,318 INFO L225 Difference]: With dead ends: 96 [2021-05-02 20:50:07,318 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 20:50:07,318 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 141784.9ms TimeCoverageRelationStatistics Valid=84, Invalid=365, Unknown=13, NotChecked=0, Total=462 [2021-05-02 20:50:07,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 20:50:07,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2021-05-02 20:50:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 54 states have internal predecessors, (58), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 20:50:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2021-05-02 20:50:07,328 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 65 [2021-05-02 20:50:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:07,328 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2021-05-02 20:50:07,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:50:07,329 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2021-05-02 20:50:07,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:50:07,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:07,330 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:07,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:07,537 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:07,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:07,537 INFO L82 PathProgramCache]: Analyzing trace with hash -2076715181, now seen corresponding path program 2 times [2021-05-02 20:50:07,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:07,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382178425] [2021-05-02 20:50:07,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:07,546 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:07,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768765719] [2021-05-02 20:50:07,546 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:07,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:50:07,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:50:07,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 20:50:07,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:07,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 20:50:07,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:07,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382178425] [2021-05-02 20:50:07,959 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:07,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768765719] [2021-05-02 20:50:07,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768765719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:07,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:07,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:50:07,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496301455] [2021-05-02 20:50:07,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:50:07,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:07,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:50:07,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:50:07,962 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-05-02 20:50:08,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:08,327 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2021-05-02 20:50:08,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:50:08,328 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 73 [2021-05-02 20:50:08,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:08,329 INFO L225 Difference]: With dead ends: 100 [2021-05-02 20:50:08,329 INFO L226 Difference]: Without dead ends: 100 [2021-05-02 20:50:08,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 274.8ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:50:08,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-02 20:50:08,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-05-02 20:50:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 72 states have internal predecessors, (80), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 17 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 20:50:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2021-05-02 20:50:08,337 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 73 [2021-05-02 20:50:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:08,337 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2021-05-02 20:50:08,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-05-02 20:50:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2021-05-02 20:50:08,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:50:08,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:08,339 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:08,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:08,547 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:08,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:08,547 INFO L82 PathProgramCache]: Analyzing trace with hash 685754451, now seen corresponding path program 3 times [2021-05-02 20:50:08,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:08,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991999486] [2021-05-02 20:50:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:08,556 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:08,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732334529] [2021-05-02 20:50:08,556 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:08,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:50:08,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:50:08,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:50:08,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:08,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 20:50:08,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:08,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991999486] [2021-05-02 20:50:08,901 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:08,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732334529] [2021-05-02 20:50:08,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732334529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:08,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:08,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:50:08,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436551153] [2021-05-02 20:50:08,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:50:08,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:08,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:50:08,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:50:08,903 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:50:13,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:13,067 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2021-05-02 20:50:13,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:50:13,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-05-02 20:50:13,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:13,068 INFO L225 Difference]: With dead ends: 112 [2021-05-02 20:50:13,068 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:50:13,069 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:50:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:50:13,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:50:13,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:50:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:50:13,069 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2021-05-02 20:50:13,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:13,069 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:50:13,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:50:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:50:13,069 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:50:13,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:50:13,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:50:13 BasicIcfg [2021-05-02 20:50:13,274 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:50:13,275 INFO L168 Benchmark]: Toolchain (without parser) took 272390.84 ms. Allocated memory was 183.5 MB in the beginning and 220.2 MB in the end (delta: 36.7 MB). Free memory was 148.8 MB in the beginning and 196.5 MB in the end (delta: -47.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:50:13,275 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 183.5 MB. Free memory is still 165.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:50:13,275 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.71 ms. Allocated memory is still 183.5 MB. Free memory was 148.5 MB in the beginning and 166.6 MB in the end (delta: -18.1 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:13,275 INFO L168 Benchmark]: Boogie Preprocessor took 47.09 ms. Allocated memory is still 183.5 MB. Free memory was 166.6 MB in the beginning and 165.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:13,275 INFO L168 Benchmark]: RCFGBuilder took 378.24 ms. Allocated memory is still 183.5 MB. Free memory was 165.2 MB in the beginning and 150.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:13,276 INFO L168 Benchmark]: IcfgTransformer took 20.36 ms. Allocated memory is still 183.5 MB. Free memory was 150.5 MB in the beginning and 149.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:50:13,276 INFO L168 Benchmark]: TraceAbstraction took 271657.80 ms. Allocated memory was 183.5 MB in the beginning and 220.2 MB in the end (delta: 36.7 MB). Free memory was 148.7 MB in the beginning and 196.5 MB in the end (delta: -47.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:50:13,276 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 183.5 MB. Free memory is still 165.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.71 ms. Allocated memory is still 183.5 MB. Free memory was 148.5 MB in the beginning and 166.6 MB in the end (delta: -18.1 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.09 ms. Allocated memory is still 183.5 MB. Free memory was 166.6 MB in the beginning and 165.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 378.24 ms. Allocated memory is still 183.5 MB. Free memory was 165.2 MB in the beginning and 150.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 20.36 ms. Allocated memory is still 183.5 MB. Free memory was 150.5 MB in the beginning and 149.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 271657.80 ms. Allocated memory was 183.5 MB in the beginning and 220.2 MB in the end (delta: 36.7 MB). Free memory was 148.7 MB in the beginning and 196.5 MB in the end (delta: -47.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 271603.4ms, OverallIterations: 9, TraceHistogramMax: 6, EmptinessCheckTime: 18.1ms, AutomataDifference: 171643.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 224 SDtfs, 149 SDslu, 1186 SDs, 0 SdLazy, 1218 SolverSat, 77 SolverUnsat, 45 SolverUnknown, 0 SolverNotchecked, 123807.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 468 GetRequests, 366 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 142808.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=8, InterpolantAutomatonStates: 92, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 72.1ms AutomataMinimizationTime, 9 MinimizatonAttempts, 45 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 114.7ms SsaConstructionTime, 315.7ms SatisfiabilityAnalysisTime, 97349.8ms InterpolantComputationTime, 463 NumberOfCodeBlocks, 393 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 454 ConstructedInterpolants, 0 QuantifiedInterpolants, 2713 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1255 ConjunctsInSsa, 179 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 396/538 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...