/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/lcm2_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:35:03,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:35:03,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:35:03,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 21:35:03,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:35:03,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:35:03,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:35:03,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:35:03,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:35:03,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:35:03,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:35:03,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:35:03,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:35:03,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:35:03,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:35:03,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:35:03,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:35:03,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:35:03,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:35:03,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:35:03,373 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:35:03,386 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:35:03,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:35:03,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:35:03,389 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:35:03,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:35:03,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:35:03,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:35:03,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:35:03,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:35:03,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:35:03,391 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:35:03,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:35:03,391 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:35:03,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:35:03,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:35:03,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:35:03,392 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:35:03,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:35:03,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:35:03,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:35:03,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:35:03,394 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:35:03,394 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:35:03,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:35:03,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:35:03,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:35:03,677 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:35:03,678 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:35:03,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound1.c [2021-05-02 21:35:03,749 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3b7e3313/5ad0f3ed537a405c8347635ecd7381f8/FLAG778a1b426 [2021-05-02 21:35:04,049 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:35:04,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound1.c [2021-05-02 21:35:04,055 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3b7e3313/5ad0f3ed537a405c8347635ecd7381f8/FLAG778a1b426 [2021-05-02 21:35:04,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3b7e3313/5ad0f3ed537a405c8347635ecd7381f8 [2021-05-02 21:35:04,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:35:04,483 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:35:04,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:35:04,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:35:04,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:35:04,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:35:04" (1/1) ... [2021-05-02 21:35:04,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@309c8e1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:35:04, skipping insertion in model container [2021-05-02 21:35:04,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:35:04" (1/1) ... [2021-05-02 21:35:04,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:35:04,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:35:04,596 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/lcm2_valuebound1.c[545,558] [2021-05-02 21:35:04,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:35:04,610 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:35:04,631 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/lcm2_valuebound1.c[545,558] [2021-05-02 21:35:04,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:35:04,650 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:35:04,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:35:04 WrapperNode [2021-05-02 21:35:04,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:35:04,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:35:04,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:35:04,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:35:04,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:35:04" (1/1) ... [2021-05-02 21:35:04,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:35:04" (1/1) ... [2021-05-02 21:35:04,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:35:04" (1/1) ... [2021-05-02 21:35:04,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:35:04" (1/1) ... [2021-05-02 21:35:04,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:35:04" (1/1) ... [2021-05-02 21:35:04,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:35:04" (1/1) ... [2021-05-02 21:35:04,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:35:04" (1/1) ... [2021-05-02 21:35:04,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:35:04,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:35:04,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:35:04,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:35:04,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:35:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:35:04,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:35:04,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:35:04,753 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:35:04,753 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:35:04,753 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:35:04,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:35:04,753 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:35:04,753 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:35:04,753 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:35:04,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:35:04,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 21:35:04,754 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:35:04,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:35:04,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:35:04,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:35:04,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:35:04,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:35:04,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:35:04,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:35:04,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:35:04,991 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:35:04,991 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 21:35:04,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:35:04 BoogieIcfgContainer [2021-05-02 21:35:04,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:35:04,993 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:35:04,993 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:35:04,993 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:35:04,995 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:35:04" (1/1) ... [2021-05-02 21:35:05,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:35:05 BasicIcfg [2021-05-02 21:35:05,022 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:35:05,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:35:05,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:35:05,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:35:05,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:35:04" (1/4) ... [2021-05-02 21:35:05,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8e2a19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:35:05, skipping insertion in model container [2021-05-02 21:35:05,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:35:04" (2/4) ... [2021-05-02 21:35:05,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8e2a19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:35:05, skipping insertion in model container [2021-05-02 21:35:05,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:35:04" (3/4) ... [2021-05-02 21:35:05,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8e2a19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:35:05, skipping insertion in model container [2021-05-02 21:35:05,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:35:05" (4/4) ... [2021-05-02 21:35:05,027 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_valuebound1.cJordan [2021-05-02 21:35:05,031 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:35:05,041 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:35:05,052 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:35:05,070 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:35:05,070 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:35:05,070 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:35:05,070 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:35:05,070 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:35:05,070 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:35:05,070 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:35:05,071 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:35:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 21:35:05,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 21:35:05,089 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:35:05,089 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 21:35:05,089 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:35:05,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:35:05,092 INFO L82 PathProgramCache]: Analyzing trace with hash -419271626, now seen corresponding path program 1 times [2021-05-02 21:35:05,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:35:05,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088125236] [2021-05-02 21:35:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:35:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:35:05,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:35:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:35:05,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:35:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:35:05,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 21:35:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:35:05,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 21:35:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:35:05,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 21:35:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:35:05,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-02 21:35:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:35:05,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-02 21:35:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:35:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 21:35:05,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:35:05,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088125236] [2021-05-02 21:35:05,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088125236] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:35:05,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:35:05,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:35:05,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323890816] [2021-05-02 21:35:05,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:35:05,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:35:05,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:35:05,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:35:05,373 INFO L87 Difference]: Start difference. First operand has 34 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 21:35:05,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:35:05,468 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-05-02 21:35:05,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:35:05,470 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-02 21:35:05,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:35:05,474 INFO L225 Difference]: With dead ends: 34 [2021-05-02 21:35:05,475 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 21:35:05,476 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:35:05,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 21:35:05,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 21:35:05,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 21:35:05,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-05-02 21:35:05,503 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 43 [2021-05-02 21:35:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:35:05,504 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-05-02 21:35:05,504 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 21:35:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-05-02 21:35:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 21:35:05,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:35:05,506 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 21:35:05,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:35:05,506 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:35:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:35:05,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1223303911, now seen corresponding path program 1 times [2021-05-02 21:35:05,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:35:05,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780830603] [2021-05-02 21:35:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:35:05,543 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:35:05,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224614836] [2021-05-02 21:35:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:35:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:35:05,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 21:35:05,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:35:05,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:05,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:05,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:05,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:05,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:05,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:05,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:05,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:05,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:05,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:05,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:05,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:05,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:05,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:05,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:05,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 21:35:05,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:35:05,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780830603] [2021-05-02 21:35:05,993 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:35:05,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224614836] [2021-05-02 21:35:05,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224614836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:35:05,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:35:05,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 21:35:05,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861903094] [2021-05-02 21:35:05,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:35:05,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:35:05,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:35:05,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:35:05,995 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 21:35:06,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:35:06,152 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-05-02 21:35:06,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 21:35:06,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-02 21:35:06,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:35:06,154 INFO L225 Difference]: With dead ends: 40 [2021-05-02 21:35:06,154 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 21:35:06,155 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:35:06,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 21:35:06,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-05-02 21:35:06,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 21:35:06,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-05-02 21:35:06,159 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 43 [2021-05-02 21:35:06,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:35:06,160 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-05-02 21:35:06,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 21:35:06,160 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-05-02 21:35:06,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 21:35:06,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:35:06,161 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1] [2021-05-02 21:35:06,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 21:35:06,369 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:35:06,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:35:06,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1282076869, now seen corresponding path program 1 times [2021-05-02 21:35:06,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:35:06,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583691036] [2021-05-02 21:35:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:35:06,383 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:35:06,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571990565] [2021-05-02 21:35:06,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:35:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:35:06,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 21:35:06,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:35:06,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 21:35:06,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:35:06,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583691036] [2021-05-02 21:35:06,658 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:35:06,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571990565] [2021-05-02 21:35:06,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571990565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:35:06,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:35:06,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 21:35:06,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497082639] [2021-05-02 21:35:06,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 21:35:06,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:35:06,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 21:35:06,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 21:35:06,659 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 21:35:06,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:35:06,725 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-05-02 21:35:06,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:35:06,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2021-05-02 21:35:06,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:35:06,726 INFO L225 Difference]: With dead ends: 39 [2021-05-02 21:35:06,726 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 21:35:06,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-02 21:35:06,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 21:35:06,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-05-02 21:35:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 21:35:06,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 21:35:06,730 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 51 [2021-05-02 21:35:06,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:35:06,730 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 21:35:06,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 21:35:06,730 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 21:35:06,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 21:35:06,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:35:06,731 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1] [2021-05-02 21:35:06,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:35:06,945 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:35:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:35:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1310706020, now seen corresponding path program 1 times [2021-05-02 21:35:06,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:35:06,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726455275] [2021-05-02 21:35:06,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:35:06,954 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:35:06,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035605611] [2021-05-02 21:35:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:35:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:35:07,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 21:35:07,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:35:07,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:35:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 21:35:07,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:35:07,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726455275] [2021-05-02 21:35:07,264 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:35:07,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035605611] [2021-05-02 21:35:07,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035605611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:35:07,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:35:07,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 21:35:07,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836189461] [2021-05-02 21:35:07,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:35:07,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:35:07,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:35:07,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:35:07,266 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 21:35:07,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:35:07,376 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-02 21:35:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 21:35:07,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2021-05-02 21:35:07,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:35:07,377 INFO L225 Difference]: With dead ends: 28 [2021-05-02 21:35:07,377 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 21:35:07,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-02 21:35:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 21:35:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 21:35:07,377 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 21:35:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 21:35:07,378 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2021-05-02 21:35:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:35:07,378 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 21:35:07,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 21:35:07,378 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 21:35:07,378 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 21:35:07,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:35:07,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:35:07 BasicIcfg [2021-05-02 21:35:07,600 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 21:35:07,600 INFO L168 Benchmark]: Toolchain (without parser) took 3117.34 ms. Allocated memory was 208.7 MB in the beginning and 265.3 MB in the end (delta: 56.6 MB). Free memory was 173.7 MB in the beginning and 211.1 MB in the end (delta: -37.4 MB). Peak memory consumption was 20.2 MB. Max. memory is 8.0 GB. [2021-05-02 21:35:07,600 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 208.7 MB. Free memory is still 190.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 21:35:07,601 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.09 ms. Allocated memory is still 208.7 MB. Free memory was 173.5 MB in the beginning and 192.0 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 21:35:07,601 INFO L168 Benchmark]: Boogie Preprocessor took 35.83 ms. Allocated memory is still 208.7 MB. Free memory was 192.0 MB in the beginning and 190.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 21:35:07,601 INFO L168 Benchmark]: RCFGBuilder took 304.39 ms. Allocated memory is still 208.7 MB. Free memory was 190.4 MB in the beginning and 174.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 21:35:07,601 INFO L168 Benchmark]: IcfgTransformer took 29.95 ms. Allocated memory is still 208.7 MB. Free memory was 174.7 MB in the beginning and 173.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 21:35:07,601 INFO L168 Benchmark]: TraceAbstraction took 2576.43 ms. Allocated memory was 208.7 MB in the beginning and 265.3 MB in the end (delta: 56.6 MB). Free memory was 172.6 MB in the beginning and 211.1 MB in the end (delta: -38.5 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. [2021-05-02 21:35:07,601 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 208.7 MB. Free memory is still 190.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 162.09 ms. Allocated memory is still 208.7 MB. Free memory was 173.5 MB in the beginning and 192.0 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.83 ms. Allocated memory is still 208.7 MB. Free memory was 192.0 MB in the beginning and 190.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 304.39 ms. Allocated memory is still 208.7 MB. Free memory was 190.4 MB in the beginning and 174.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 29.95 ms. Allocated memory is still 208.7 MB. Free memory was 174.7 MB in the beginning and 173.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2576.43 ms. Allocated memory was 208.7 MB in the beginning and 265.3 MB in the end (delta: 56.6 MB). Free memory was 172.6 MB in the beginning and 211.1 MB in the end (delta: -38.5 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2529.0ms, OverallIterations: 4, TraceHistogramMax: 6, EmptinessCheckTime: 13.4ms, AutomataDifference: 450.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 102 SDtfs, 66 SDslu, 253 SDs, 0 SdLazy, 254 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 260.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 246.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=3, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 26.9ms AutomataMinimizationTime, 4 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 39.5ms SsaConstructionTime, 206.0ms SatisfiabilityAnalysisTime, 925.5ms InterpolantComputationTime, 188 NumberOfCodeBlocks, 188 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 498 SizeOfPredicates, 16 NumberOfNonLiveVariables, 515 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 197/248 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...