/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/ps5-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:27:53,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:27:53,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:27:53,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:27:53,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:27:53,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:27:53,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:27:53,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:27:53,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:27:53,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:27:53,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:27:53,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:27:53,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:27:53,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:27:53,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:27:53,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:27:53,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:27:53,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:27:53,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:27:53,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:27:53,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:27:53,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:27:53,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:27:53,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:27:53,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:27:53,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:27:53,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:27:53,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:27:53,829 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:27:53,845 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:27:53,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:27:53,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:27:53,848 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:27:53,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:27:53,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:27:53,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:27:53,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:27:53,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:27:53,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:27:53,850 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:27:53,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:27:53,850 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:27:53,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:27:53,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:27:53,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:27:53,851 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:27:53,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:27:53,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:27:53,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:27:53,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:27:53,852 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:27:53,852 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:27:54,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:27:54,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:27:54,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:27:54,193 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:27:54,194 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:27:54,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound2.c [2021-05-06 10:27:54,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/542da1e45/c458fed497d1401bbcea3bc7b14c88a1/FLAGcdd3509c7 [2021-05-06 10:27:54,564 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:27:54,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound2.c [2021-05-06 10:27:54,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/542da1e45/c458fed497d1401bbcea3bc7b14c88a1/FLAGcdd3509c7 [2021-05-06 10:27:54,971 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/542da1e45/c458fed497d1401bbcea3bc7b14c88a1 [2021-05-06 10:27:54,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:27:54,974 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:27:54,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:27:54,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:27:54,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:27:54,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:27:54" (1/1) ... [2021-05-06 10:27:54,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a808c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:54, skipping insertion in model container [2021-05-06 10:27:54,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:27:54" (1/1) ... [2021-05-06 10:27:54,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:27:55,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:27:55,136 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound2.c[458,471] [2021-05-06 10:27:55,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:27:55,159 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:27:55,168 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/ps5-ll_unwindbound2.c[458,471] [2021-05-06 10:27:55,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:27:55,185 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:27:55,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:55 WrapperNode [2021-05-06 10:27:55,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:27:55,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:27:55,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:27:55,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:27:55,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:55" (1/1) ... [2021-05-06 10:27:55,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:55" (1/1) ... [2021-05-06 10:27:55,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:55" (1/1) ... [2021-05-06 10:27:55,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:55" (1/1) ... [2021-05-06 10:27:55,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:55" (1/1) ... [2021-05-06 10:27:55,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:55" (1/1) ... [2021-05-06 10:27:55,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:55" (1/1) ... [2021-05-06 10:27:55,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:27:55,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:27:55,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:27:55,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:27:55,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:27:55,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:27:55,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:27:55,329 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:27:55,329 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:27:55,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:27:55,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:27:55,329 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:27:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:27:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:27:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:27:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:27:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:27:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:27:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:27:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:27:55,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:27:55,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:27:55,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:27:55,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:27:55,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:27:55,522 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:27:55,522 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:27:55,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:27:55 BoogieIcfgContainer [2021-05-06 10:27:55,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:27:55,524 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:27:55,524 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:27:55,525 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:27:55,527 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:27:55" (1/1) ... [2021-05-06 10:27:55,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:27:55 BasicIcfg [2021-05-06 10:27:55,542 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:27:55,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:27:55,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:27:55,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:27:55,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:27:54" (1/4) ... [2021-05-06 10:27:55,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d37f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:27:55, skipping insertion in model container [2021-05-06 10:27:55,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:27:55" (2/4) ... [2021-05-06 10:27:55,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d37f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:27:55, skipping insertion in model container [2021-05-06 10:27:55,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:27:55" (3/4) ... [2021-05-06 10:27:55,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d37f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:27:55, skipping insertion in model container [2021-05-06 10:27:55,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:27:55" (4/4) ... [2021-05-06 10:27:55,565 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound2.cJordan [2021-05-06 10:27:55,569 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:27:55,572 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:27:55,585 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:27:55,600 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:27:55,600 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:27:55,600 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:27:55,600 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:27:55,600 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:27:55,600 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:27:55,600 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:27:55,600 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:27:55,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:27:55,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:27:55,633 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:55,633 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:55,633 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:55,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:55,638 INFO L82 PathProgramCache]: Analyzing trace with hash 843387237, now seen corresponding path program 1 times [2021-05-06 10:27:55,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:55,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529544932] [2021-05-06 10:27:55,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:55,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:27:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:55,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:27:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:55,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:55,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529544932] [2021-05-06 10:27:55,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529544932] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:27:55,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:27:55,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:27:55,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216637871] [2021-05-06 10:27:55,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:27:55,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:55,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:27:55,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:27:55,935 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:27:56,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:56,015 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-06 10:27:56,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:27:56,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:27:56,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:56,024 INFO L225 Difference]: With dead ends: 30 [2021-05-06 10:27:56,024 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 10:27:56,025 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:27:56,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 10:27:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-06 10:27:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:27:56,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 10:27:56,056 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-05-06 10:27:56,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:56,056 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 10:27:56,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:27:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 10:27:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:27:56,058 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:56,059 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:56,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:27:56,059 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:56,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:56,060 INFO L82 PathProgramCache]: Analyzing trace with hash 208087835, now seen corresponding path program 1 times [2021-05-06 10:27:56,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:56,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223743112] [2021-05-06 10:27:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:56,093 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:56,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036389348] [2021-05-06 10:27:56,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:56,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 10:27:56,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:56,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:56,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:56,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:56,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:56,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:56,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:56,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223743112] [2021-05-06 10:27:56,316 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:56,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036389348] [2021-05-06 10:27:56,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036389348] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:27:56,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:27:56,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:27:56,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565768448] [2021-05-06 10:27:56,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 10:27:56,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:56,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 10:27:56,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:27:56,320 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:27:56,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:56,335 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 10:27:56,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 10:27:56,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 10:27:56,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:56,337 INFO L225 Difference]: With dead ends: 26 [2021-05-06 10:27:56,338 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:27:56,339 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:27:56,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:27:56,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 10:27:56,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:27:56,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 10:27:56,350 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-05-06 10:27:56,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:56,350 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 10:27:56,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:27:56,351 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 10:27:56,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:27:56,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:56,358 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:56,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:27:56,577 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:56,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:56,577 INFO L82 PathProgramCache]: Analyzing trace with hash 209190102, now seen corresponding path program 1 times [2021-05-06 10:27:56,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:56,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632478819] [2021-05-06 10:27:56,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:56,595 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:56,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755685818] [2021-05-06 10:27:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:56,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:27:56,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:56,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:56,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:56,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632478819] [2021-05-06 10:27:56,707 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:56,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755685818] [2021-05-06 10:27:56,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755685818] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:27:56,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:27:56,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:27:56,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464128568] [2021-05-06 10:27:56,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:27:56,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:56,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:27:56,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:27:56,709 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:27:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:56,740 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-06 10:27:56,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:27:56,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 10:27:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:56,741 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:27:56,741 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 10:27:56,742 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:27:56,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 10:27:56,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 10:27:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:27:56,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-06 10:27:56,747 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-06 10:27:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:56,747 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-06 10:27:56,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:27:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-06 10:27:56,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 10:27:56,748 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:56,748 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:56,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:56,972 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:56,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:56,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1223799235, now seen corresponding path program 1 times [2021-05-06 10:27:56,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:56,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358523307] [2021-05-06 10:27:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:56,982 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:56,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456561761] [2021-05-06 10:27:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:57,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:27:57,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:57,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:57,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:57,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:57,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:57,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:57,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:57,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:57,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:57,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:57,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358523307] [2021-05-06 10:27:57,099 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:57,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456561761] [2021-05-06 10:27:57,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456561761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:57,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:57,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 10:27:57,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677884256] [2021-05-06 10:27:57,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:27:57,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:57,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:27:57,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:27:57,101 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:27:57,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:57,126 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 10:27:57,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:27:57,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-06 10:27:57,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:57,127 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:27:57,127 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 10:27:57,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:27:57,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 10:27:57,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 10:27:57,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:27:57,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 10:27:57,131 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-06 10:27:57,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:57,132 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 10:27:57,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:27:57,132 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 10:27:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 10:27:57,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:57,133 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:57,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:57,347 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:57,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:57,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1222696968, now seen corresponding path program 1 times [2021-05-06 10:27:57,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:57,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484736024] [2021-05-06 10:27:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:57,358 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:57,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887964704] [2021-05-06 10:27:57,358 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 [2021-05-06 10:27:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:57,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:27:57,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:57,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:57,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:57,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484736024] [2021-05-06 10:27:57,512 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:57,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887964704] [2021-05-06 10:27:57,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887964704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:57,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:57,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:27:57,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693430258] [2021-05-06 10:27:57,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:27:57,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:57,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:27:57,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:27:57,514 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:27:57,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:57,572 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-06 10:27:57,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:27:57,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 10:27:57,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:57,574 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:27:57,574 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 10:27:57,574 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:27:57,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 10:27:57,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 10:27:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:27:57,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-05-06 10:27:57,579 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2021-05-06 10:27:57,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:57,580 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-05-06 10:27:57,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:27:57,580 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-05-06 10:27:57,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:27:57,581 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:57,581 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:57,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:57,788 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:57,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:57,789 INFO L82 PathProgramCache]: Analyzing trace with hash -688312481, now seen corresponding path program 2 times [2021-05-06 10:27:57,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:57,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712221926] [2021-05-06 10:27:57,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:57,805 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:57,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228881986] [2021-05-06 10:27:57,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:57,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:27:57,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:57,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:27:57,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:58,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 10:27:58,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:58,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712221926] [2021-05-06 10:27:58,152 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:58,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228881986] [2021-05-06 10:27:58,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228881986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:58,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:58,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:27:58,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852869705] [2021-05-06 10:27:58,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:27:58,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:58,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:27:58,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:27:58,155 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:27:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:58,272 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-05-06 10:27:58,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:27:58,273 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-06 10:27:58,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:58,274 INFO L225 Difference]: With dead ends: 52 [2021-05-06 10:27:58,274 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 10:27:58,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:27:58,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 10:27:58,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-05-06 10:27:58,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:27:58,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-05-06 10:27:58,280 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 34 [2021-05-06 10:27:58,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:58,280 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-05-06 10:27:58,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:27:58,280 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-05-06 10:27:58,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 10:27:58,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:58,281 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:58,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 10:27:58,487 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:58,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:58,487 INFO L82 PathProgramCache]: Analyzing trace with hash 96926796, now seen corresponding path program 1 times [2021-05-06 10:27:58,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:58,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922074890] [2021-05-06 10:27:58,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:58,497 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:58,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430029855] [2021-05-06 10:27:58,497 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 [2021-05-06 10:27:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:58,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:27:58,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:58,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:58,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:58,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:58,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:58,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:58,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:58,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:58,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:58,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:58,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:58,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:27:58,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:58,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922074890] [2021-05-06 10:27:58,671 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:58,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430029855] [2021-05-06 10:27:58,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430029855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:58,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:58,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:27:58,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962102554] [2021-05-06 10:27:58,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:27:58,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:58,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:27:58,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:27:58,673 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:27:58,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:58,742 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-05-06 10:27:58,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:27:58,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-06 10:27:58,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:58,745 INFO L225 Difference]: With dead ends: 55 [2021-05-06 10:27:58,745 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:27:58,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:27:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:27:58,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 10:27:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:27:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-05-06 10:27:58,750 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 37 [2021-05-06 10:27:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:58,750 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-05-06 10:27:58,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:27:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-05-06 10:27:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 10:27:58,751 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:58,751 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:58,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:58,970 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:58,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:58,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1336575769, now seen corresponding path program 1 times [2021-05-06 10:27:58,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:58,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894803219] [2021-05-06 10:27:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:58,979 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:58,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110304221] [2021-05-06 10:27:58,979 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 [2021-05-06 10:27:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 10:27:59,145 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 10:27:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 10:27:59,173 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 10:27:59,230 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 10:27:59,230 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 10:27:59,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:59,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:27:59 BasicIcfg [2021-05-06 10:27:59,458 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:27:59,459 INFO L168 Benchmark]: Toolchain (without parser) took 4484.45 ms. Allocated memory was 182.5 MB in the beginning and 235.9 MB in the end (delta: 53.5 MB). Free memory was 148.8 MB in the beginning and 99.5 MB in the end (delta: 49.4 MB). Peak memory consumption was 102.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:27:59,459 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 182.5 MB. Free memory is still 165.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:27:59,459 INFO L168 Benchmark]: CACSL2BoogieTranslator took 209.58 ms. Allocated memory is still 182.5 MB. Free memory was 148.6 MB in the beginning and 138.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 10:27:59,459 INFO L168 Benchmark]: Boogie Preprocessor took 29.50 ms. Allocated memory is still 182.5 MB. Free memory was 138.8 MB in the beginning and 137.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:27:59,459 INFO L168 Benchmark]: RCFGBuilder took 307.61 ms. Allocated memory is still 182.5 MB. Free memory was 137.2 MB in the beginning and 152.4 MB in the end (delta: -15.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:27:59,459 INFO L168 Benchmark]: IcfgTransformer took 18.44 ms. Allocated memory is still 182.5 MB. Free memory was 152.4 MB in the beginning and 151.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:27:59,459 INFO L168 Benchmark]: TraceAbstraction took 3914.41 ms. Allocated memory was 182.5 MB in the beginning and 235.9 MB in the end (delta: 53.5 MB). Free memory was 150.8 MB in the beginning and 99.5 MB in the end (delta: 51.4 MB). Peak memory consumption was 105.9 MB. Max. memory is 8.0 GB. [2021-05-06 10:27:59,460 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 182.5 MB. Free memory is still 165.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 209.58 ms. Allocated memory is still 182.5 MB. Free memory was 148.6 MB in the beginning and 138.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.50 ms. Allocated memory is still 182.5 MB. Free memory was 138.8 MB in the beginning and 137.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 307.61 ms. Allocated memory is still 182.5 MB. Free memory was 137.2 MB in the beginning and 152.4 MB in the end (delta: -15.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * IcfgTransformer took 18.44 ms. Allocated memory is still 182.5 MB. Free memory was 152.4 MB in the beginning and 151.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3914.41 ms. Allocated memory was 182.5 MB in the beginning and 235.9 MB in the end (delta: 53.5 MB). Free memory was 150.8 MB in the beginning and 99.5 MB in the end (delta: 51.4 MB). Peak memory consumption was 105.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [\old(counter)=15, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L22] CALL assume_abort_if_not(k <= 256) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L7] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L22] RET assume_abort_if_not(k <= 256) VAL [\old(counter)=0, counter=0, k=3] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=3, x=0, y=0] [L28] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=3, x=0, y=0] [L28] COND TRUE counter++<2 [L29] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L29] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(counter)=0, c=0, counter=1, k=3, x=0, y=0] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=3, x=1, y=1] [L28] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=3, x=1, y=1] [L28] COND TRUE counter++<2 [L29] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L29] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(counter)=0, c=1, counter=2, k=3, x=1, y=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [\old(counter)=0, c=2, counter=2, k=3, x=17, y=2] [L28] EXPR counter++ VAL [\old(counter)=0, c=2, counter=3, counter++=2, k=3, x=17, y=2] [L28] COND FALSE !(counter++<2) [L39] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L39] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(counter)=0, c=2, counter=3, k=3, x=17, y=2] [L40] CALL __VERIFIER_assert(k*y == y*y) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3833.0ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 19.1ms, AutomataDifference: 438.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 196 SDtfs, 49 SDslu, 547 SDs, 0 SdLazy, 232 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 234.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 214.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=6, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 53.0ms AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 67.2ms SsaConstructionTime, 469.6ms SatisfiabilityAnalysisTime, 771.5ms InterpolantComputationTime, 215 NumberOfCodeBlocks, 215 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 169 ConstructedInterpolants, 0 QuantifiedInterpolants, 540 SizeOfPredicates, 9 NumberOfNonLiveVariables, 808 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 29/47 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...