/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/egcd-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:18:52,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:18:52,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:18:52,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:18:52,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:18:52,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:18:52,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:18:52,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:18:52,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:18:52,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:18:52,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:18:52,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:18:52,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:18:52,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:18:52,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:18:52,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:18:52,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:18:52,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:18:52,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:18:52,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:18:52,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:18:52,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:18:52,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:18:52,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:18:52,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:18:52,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:18:52,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:18:52,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:18:52,204 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:18:52,214 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:18:52,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:18:52,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:18:52,216 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:18:52,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:18:52,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:18:52,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:18:52,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:18:52,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:18:52,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:18:52,217 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:18:52,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:18:52,218 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:18:52,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:18:52,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:18:52,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:18:52,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:18:52,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:18:52,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:18:52,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:18:52,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:18:52,220 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:18:52,221 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:18:52,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:18:52,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:18:52,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:18:52,579 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:18:52,580 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:18:52,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c [2021-05-02 20:18:52,644 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7010647c2/8e12ae332d9943cab0b11428f0b381b2/FLAG41cb47419 [2021-05-02 20:18:53,151 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:18:53,152 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c [2021-05-02 20:18:53,158 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7010647c2/8e12ae332d9943cab0b11428f0b381b2/FLAG41cb47419 [2021-05-02 20:18:53,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7010647c2/8e12ae332d9943cab0b11428f0b381b2 [2021-05-02 20:18:53,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:18:53,644 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:18:53,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:18:53,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:18:53,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:18:53,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:18:53" (1/1) ... [2021-05-02 20:18:53,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a20eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:53, skipping insertion in model container [2021-05-02 20:18:53,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:18:53" (1/1) ... [2021-05-02 20:18:53,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:18:53,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:18:53,809 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/egcd-ll_valuebound2.c[489,502] [2021-05-02 20:18:53,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:18:53,846 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:18:53,859 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/egcd-ll_valuebound2.c[489,502] [2021-05-02 20:18:53,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:18:53,907 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:18:53,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:53 WrapperNode [2021-05-02 20:18:53,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:18:53,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:18:53,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:18:53,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:18:53,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:53" (1/1) ... [2021-05-02 20:18:53,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:53" (1/1) ... [2021-05-02 20:18:53,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:53" (1/1) ... [2021-05-02 20:18:53,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:53" (1/1) ... [2021-05-02 20:18:53,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:53" (1/1) ... [2021-05-02 20:18:53,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:53" (1/1) ... [2021-05-02 20:18:53,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:53" (1/1) ... [2021-05-02 20:18:53,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:18:53,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:18:53,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:18:53,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:18:53,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:53" (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 20:18:54,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:18:54,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:18:54,040 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:18:54,040 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:18:54,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:18:54,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:18:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:18:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:18:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:18:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:18:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:18:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:18:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:18:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:18:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:18:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:18:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:18:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:18:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:18:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:18:54,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:18:54,301 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:18:54,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:18:54 BoogieIcfgContainer [2021-05-02 20:18:54,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:18:54,302 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:18:54,302 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:18:54,303 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:18:54,318 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:18:54" (1/1) ... [2021-05-02 20:18:54,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:18:54 BasicIcfg [2021-05-02 20:18:54,346 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:18:54,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:18:54,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:18:54,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:18:54,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:18:53" (1/4) ... [2021-05-02 20:18:54,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d18d873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:18:54, skipping insertion in model container [2021-05-02 20:18:54,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:53" (2/4) ... [2021-05-02 20:18:54,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d18d873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:18:54, skipping insertion in model container [2021-05-02 20:18:54,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:18:54" (3/4) ... [2021-05-02 20:18:54,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d18d873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:18:54, skipping insertion in model container [2021-05-02 20:18:54,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:18:54" (4/4) ... [2021-05-02 20:18:54,353 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound2.cJordan [2021-05-02 20:18:54,373 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:18:54,377 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:18:54,420 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:18:54,435 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:18:54,436 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:18:54,436 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:18:54,436 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:18:54,436 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:18:54,436 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:18:54,436 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:18:54,436 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:18:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:18:54,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:18:54,454 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:54,455 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 20:18:54,455 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:54,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1381881312, now seen corresponding path program 1 times [2021-05-02 20:18:54,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:54,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678756908] [2021-05-02 20:18:54,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:54,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:18:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:54,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:18:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:54,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:18:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:54,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:18:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:54,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:18:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:54,683 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 20:18:54,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:54,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678756908] [2021-05-02 20:18:54,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678756908] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:54,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:54,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:18:54,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827078680] [2021-05-02 20:18:54,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:18:54,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:54,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:18:54,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:18:54,703 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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 20:18:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:54,911 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-02 20:18:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:18:54,913 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 20:18:54,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:54,918 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:18:54,918 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:18:54,919 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:18:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:18:54,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:18:54,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:18:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 20:18:54,963 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-02 20:18:54,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:54,963 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 20:18:54,964 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 20:18:54,964 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 20:18:54,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:18:54,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:54,967 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 20:18:54,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:18:54,968 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:54,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:54,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1975235811, now seen corresponding path program 1 times [2021-05-02 20:18:54,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:54,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986821030] [2021-05-02 20:18:54,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:55,019 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:55,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636990393] [2021-05-02 20:18:55,020 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 20:18:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:55,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:18:55,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:55,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:55,339 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 20:18:55,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:55,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986821030] [2021-05-02 20:18:55,339 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:55,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636990393] [2021-05-02 20:18:55,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636990393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:55,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:55,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:18:55,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728292625] [2021-05-02 20:18:55,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:18:55,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:55,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:18:55,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:18:55,344 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:18:55,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:55,444 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-05-02 20:18:55,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:18:55,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-02 20:18:55,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:55,446 INFO L225 Difference]: With dead ends: 46 [2021-05-02 20:18:55,446 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:18:55,446 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:55,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:18:55,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 20:18:55,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:18:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-02 20:18:55,456 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-02 20:18:55,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:55,456 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-02 20:18:55,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:18:55,456 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-02 20:18:55,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:18:55,457 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:55,457 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] [2021-05-02 20:18:55,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:18:55,681 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:55,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:55,682 INFO L82 PathProgramCache]: Analyzing trace with hash -759782395, now seen corresponding path program 1 times [2021-05-02 20:18:55,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:55,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197276571] [2021-05-02 20:18:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:55,699 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:55,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093070776] [2021-05-02 20:18:55,699 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 20:18:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:55,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:18:55,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:55,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:55,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:55,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:55,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:55,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:55,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:55,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:55,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:55,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:55,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:18:56,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:56,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197276571] [2021-05-02 20:18:56,096 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:56,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093070776] [2021-05-02 20:18:56,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093070776] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:56,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:56,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 20:18:56,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676701728] [2021-05-02 20:18:56,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:18:56,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:56,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:18:56,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:56,098 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 20:18:56,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:56,295 INFO L93 Difference]: Finished difference Result 68 states and 100 transitions. [2021-05-02 20:18:56,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:18:56,296 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2021-05-02 20:18:56,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:56,302 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:18:56,303 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:18:56,304 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:18:56,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:18:56,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-02 20:18:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 20:18:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-02 20:18:56,330 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-02 20:18:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:56,330 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-02 20:18:56,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 20:18:56,331 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-02 20:18:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:18:56,332 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:56,332 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1] [2021-05-02 20:18:56,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:56,557 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:56,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:56,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1840397536, now seen corresponding path program 1 times [2021-05-02 20:18:56,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:56,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749423006] [2021-05-02 20:18:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:56,573 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:56,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925496896] [2021-05-02 20:18:56,574 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 20:18:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:56,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:18:56,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:56,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:18:56,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:56,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749423006] [2021-05-02 20:18:56,940 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:56,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925496896] [2021-05-02 20:18:56,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925496896] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:56,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:56,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 20:18:56,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032870070] [2021-05-02 20:18:56,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:18:56,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:56,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:18:56,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:56,946 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 20:18:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:57,104 INFO L93 Difference]: Finished difference Result 66 states and 91 transitions. [2021-05-02 20:18:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:18:57,104 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43 [2021-05-02 20:18:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:57,106 INFO L225 Difference]: With dead ends: 66 [2021-05-02 20:18:57,106 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 20:18:57,106 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:18:57,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 20:18:57,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 20:18:57,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:18:57,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-02 20:18:57,113 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-02 20:18:57,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:57,113 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-02 20:18:57,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 20:18:57,113 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-02 20:18:57,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 20:18:57,114 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:57,115 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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, 1, 1] [2021-05-02 20:18:57,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:57,339 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:57,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:57,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1590647429, now seen corresponding path program 1 times [2021-05-02 20:18:57,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:57,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092421572] [2021-05-02 20:18:57,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:57,357 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:57,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082912554] [2021-05-02 20:18:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:57,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:18:57,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:18:57,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:57,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092421572] [2021-05-02 20:18:57,504 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:57,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082912554] [2021-05-02 20:18:57,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082912554] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:57,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:57,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:18:57,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624625263] [2021-05-02 20:18:57,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:18:57,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:57,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:18:57,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:18:57,506 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 20:18:57,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:57,546 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2021-05-02 20:18:57,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:18:57,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-02 20:18:57,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:57,552 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:18:57,552 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:18:57,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:18:57,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:18:57,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 20:18:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:18:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-02 20:18:57,571 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-02 20:18:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:57,571 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-02 20:18:57,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 20:18:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-02 20:18:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 20:18:57,573 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:57,573 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:57,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:57,799 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:57,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:57,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1766531305, now seen corresponding path program 1 times [2021-05-02 20:18:57,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:57,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713731442] [2021-05-02 20:18:57,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:57,812 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:57,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68896318] [2021-05-02 20:18:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:57,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:18:57,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:57,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 20:18:57,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:57,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713731442] [2021-05-02 20:18:57,986 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:57,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68896318] [2021-05-02 20:18:57,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68896318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:57,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:57,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:18:57,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239624685] [2021-05-02 20:18:57,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:18:57,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:57,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:18:57,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:18:57,988 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:18:58,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:58,080 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-05-02 20:18:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:18:58,080 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-02 20:18:58,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:58,083 INFO L225 Difference]: With dead ends: 82 [2021-05-02 20:18:58,083 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 20:18:58,083 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:58,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 20:18:58,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-02 20:18:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:18:58,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 20:18:58,097 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-02 20:18:58,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:58,097 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 20:18:58,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:18:58,097 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 20:18:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:18:58,100 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:58,100 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-05-02 20:18:58,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:18:58,305 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:58,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:58,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1046589490, now seen corresponding path program 1 times [2021-05-02 20:18:58,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:58,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54739790] [2021-05-02 20:18:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:58,322 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:58,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306575623] [2021-05-02 20:18:58,322 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 20:18:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:58,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:18:58,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:58,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:58,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:18:58,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:58,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54739790] [2021-05-02 20:18:58,567 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:58,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306575623] [2021-05-02 20:18:58,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306575623] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:58,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:58,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:18:58,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288609517] [2021-05-02 20:18:58,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:18:58,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:58,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:18:58,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:58,569 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:18:58,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:58,688 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2021-05-02 20:18:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:18:58,690 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-02 20:18:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:58,692 INFO L225 Difference]: With dead ends: 86 [2021-05-02 20:18:58,692 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 20:18:58,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:58,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 20:18:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 20:18:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:18:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-02 20:18:58,705 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-02 20:18:58,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:58,705 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-02 20:18:58,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:18:58,706 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-02 20:18:58,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 20:18:58,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:58,712 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:58,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:58,927 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:58,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:58,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2126309122, now seen corresponding path program 1 times [2021-05-02 20:18:58,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:58,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599375012] [2021-05-02 20:18:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:58,951 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:58,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91875015] [2021-05-02 20:18:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:59,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:18:59,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:59,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:18:59,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:59,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599375012] [2021-05-02 20:18:59,291 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:59,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91875015] [2021-05-02 20:18:59,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91875015] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:59,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:59,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:18:59,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994095893] [2021-05-02 20:18:59,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:18:59,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:59,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:18:59,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:18:59,292 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:18:59,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:59,449 INFO L93 Difference]: Finished difference Result 108 states and 139 transitions. [2021-05-02 20:18:59,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:18:59,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-02 20:18:59,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:59,451 INFO L225 Difference]: With dead ends: 108 [2021-05-02 20:18:59,451 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 20:18:59,451 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 20:18:59,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2021-05-02 20:18:59,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 61 states have internal predecessors, (68), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 20:18:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 132 transitions. [2021-05-02 20:18:59,457 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 132 transitions. Word has length 56 [2021-05-02 20:18:59,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:59,458 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 132 transitions. [2021-05-02 20:18:59,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:18:59,458 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 132 transitions. [2021-05-02 20:18:59,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:18:59,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:59,459 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:59,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:59,683 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:59,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:59,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1746772058, now seen corresponding path program 2 times [2021-05-02 20:18:59,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:59,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421941180] [2021-05-02 20:18:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:59,698 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:59,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683608812] [2021-05-02 20:18:59,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:59,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:18:59,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:59,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 20:18:59,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:59,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:59,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-02 20:19:00,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:00,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421941180] [2021-05-02 20:19:00,165 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:00,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683608812] [2021-05-02 20:19:00,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683608812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:00,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:00,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:19:00,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024334189] [2021-05-02 20:19:00,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:19:00,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:00,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:19:00,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:19:00,166 INFO L87 Difference]: Start difference. First operand 104 states and 132 transitions. Second operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 20:19:00,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:00,485 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2021-05-02 20:19:00,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:19:00,486 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 61 [2021-05-02 20:19:00,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:00,487 INFO L225 Difference]: With dead ends: 120 [2021-05-02 20:19:00,487 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 20:19:00,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:19:00,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 20:19:00,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 20:19:00,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 57 states have internal predecessors, (62), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:19:00,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2021-05-02 20:19:00,492 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 61 [2021-05-02 20:19:00,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:00,493 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2021-05-02 20:19:00,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 20:19:00,493 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2021-05-02 20:19:00,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:19:00,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:00,494 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:00,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:19:00,717 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:00,718 INFO L82 PathProgramCache]: Analyzing trace with hash -296466288, now seen corresponding path program 1 times [2021-05-02 20:19:00,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:00,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026946274] [2021-05-02 20:19:00,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:00,727 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:00,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954379846] [2021-05-02 20:19:00,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:00,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 20:19:00,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:00,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 20:19:00,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:00,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026946274] [2021-05-02 20:19:00,961 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:00,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954379846] [2021-05-02 20:19:00,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954379846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:00,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:00,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:19:00,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062478278] [2021-05-02 20:19:00,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:19:00,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:00,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:19:00,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:19:00,963 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:19:01,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:01,064 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2021-05-02 20:19:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:19:01,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 20:19:01,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:01,066 INFO L225 Difference]: With dead ends: 64 [2021-05-02 20:19:01,066 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 20:19:01,066 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 20:19:01,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-05-02 20:19:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.027027027027027) internal successors, (38), 38 states have internal predecessors, (38), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:19:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2021-05-02 20:19:01,069 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 69 [2021-05-02 20:19:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:01,069 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2021-05-02 20:19:01,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:19:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2021-05-02 20:19:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:19:01,070 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:01,070 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 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 20:19:01,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:01,289 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:01,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:01,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1674813879, now seen corresponding path program 2 times [2021-05-02 20:19:01,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:01,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388604971] [2021-05-02 20:19:01,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:01,298 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:01,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782129820] [2021-05-02 20:19:01,299 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:01,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:19:01,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:01,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 20:19:01,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:01,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-05-02 20:19:01,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:01,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388604971] [2021-05-02 20:19:01,552 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:01,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782129820] [2021-05-02 20:19:01,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782129820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:01,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:01,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:19:01,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250295847] [2021-05-02 20:19:01,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:19:01,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:01,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:19:01,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:19:01,554 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:19:01,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:01,634 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-05-02 20:19:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:19:01,634 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-02 20:19:01,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:01,635 INFO L225 Difference]: With dead ends: 52 [2021-05-02 20:19:01,635 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:19:01,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:19:01,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:19:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:19:01,636 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 20:19:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:19:01,636 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2021-05-02 20:19:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:01,636 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:19:01,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:19:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:19:01,637 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:19:01,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:01,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:19:01 BasicIcfg [2021-05-02 20:19:01,863 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:19:01,864 INFO L168 Benchmark]: Toolchain (without parser) took 8219.55 ms. Allocated memory was 255.9 MB in the beginning and 311.4 MB in the end (delta: 55.6 MB). Free memory was 220.9 MB in the beginning and 211.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 65.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:19:01,864 INFO L168 Benchmark]: CDTParser took 0.72 ms. Allocated memory is still 255.9 MB. Free memory is still 238.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:19:01,864 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.92 ms. Allocated memory is still 255.9 MB. Free memory was 220.7 MB in the beginning and 239.2 MB in the end (delta: -18.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:19:01,864 INFO L168 Benchmark]: Boogie Preprocessor took 48.74 ms. Allocated memory is still 255.9 MB. Free memory was 239.2 MB in the beginning and 237.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:19:01,864 INFO L168 Benchmark]: RCFGBuilder took 341.32 ms. Allocated memory is still 255.9 MB. Free memory was 237.7 MB in the beginning and 222.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:19:01,864 INFO L168 Benchmark]: IcfgTransformer took 43.93 ms. Allocated memory is still 255.9 MB. Free memory was 222.0 MB in the beginning and 220.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:19:01,865 INFO L168 Benchmark]: TraceAbstraction took 7515.84 ms. Allocated memory was 255.9 MB in the beginning and 311.4 MB in the end (delta: 55.6 MB). Free memory was 220.5 MB in the beginning and 211.6 MB in the end (delta: 8.8 MB). Peak memory consumption was 65.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:19:01,865 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.72 ms. Allocated memory is still 255.9 MB. Free memory is still 238.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 261.92 ms. Allocated memory is still 255.9 MB. Free memory was 220.7 MB in the beginning and 239.2 MB in the end (delta: -18.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.74 ms. Allocated memory is still 255.9 MB. Free memory was 239.2 MB in the beginning and 237.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 341.32 ms. Allocated memory is still 255.9 MB. Free memory was 237.7 MB in the beginning and 222.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 43.93 ms. Allocated memory is still 255.9 MB. Free memory was 222.0 MB in the beginning and 220.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7515.84 ms. Allocated memory was 255.9 MB in the beginning and 311.4 MB in the end (delta: 55.6 MB). Free memory was 220.5 MB in the beginning and 211.6 MB in the end (delta: 8.8 MB). Peak memory consumption was 65.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7426.6ms, OverallIterations: 11, TraceHistogramMax: 8, EmptinessCheckTime: 27.2ms, AutomataDifference: 1634.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 393 SDtfs, 209 SDslu, 1602 SDs, 0 SdLazy, 1099 SolverSat, 178 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 961.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 558 GetRequests, 461 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 913.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=8, InterpolantAutomatonStates: 93, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 132.7ms AutomataMinimizationTime, 11 MinimizatonAttempts, 18 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 109.2ms SsaConstructionTime, 293.2ms SatisfiabilityAnalysisTime, 2425.3ms InterpolantComputationTime, 561 NumberOfCodeBlocks, 561 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 1971 SizeOfPredicates, 49 NumberOfNonLiveVariables, 1772 ConjunctsInSsa, 235 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 558/625 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...