/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/sqrt1-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:51:12,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:51:12,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:51:12,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:51:12,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:51:12,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:51:12,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:51:12,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:51:12,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:51:12,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:51:12,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:51:12,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:51:12,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:51:12,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:51:12,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:51:12,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:51:12,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:51:12,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:51:12,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:51:12,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:51:12,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:51:12,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:51:12,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:51:12,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:51:12,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:51:12,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:51:12,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:51:12,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:51:12,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:51:12,600 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:51:12,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:51:12,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:51:12,603 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:51:12,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:51:12,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:51:12,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:51:12,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:51:12,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:51:12,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:51:12,605 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:51:12,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:51:12,605 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:51:12,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:51:12,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:51:12,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:51:12,606 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:51:12,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:51:12,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:51:12,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:51:12,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:51:12,608 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:51:12,608 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:51:12,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:51:12,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:51:12,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:51:12,974 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:51:12,975 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:51:12,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound1.c [2021-05-02 22:51:13,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b3f8e5ef/7f7cef8a110449a38ede31d2a26e21fa/FLAGbcdc3031a [2021-05-02 22:51:13,411 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:51:13,411 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound1.c [2021-05-02 22:51:13,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b3f8e5ef/7f7cef8a110449a38ede31d2a26e21fa/FLAGbcdc3031a [2021-05-02 22:51:13,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b3f8e5ef/7f7cef8a110449a38ede31d2a26e21fa [2021-05-02 22:51:13,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:51:13,813 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:51:13,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:51:13,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:51:13,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:51:13,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:51:13" (1/1) ... [2021-05-02 22:51:13,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61544b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:13, skipping insertion in model container [2021-05-02 22:51:13,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:51:13" (1/1) ... [2021-05-02 22:51:13,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:51:13,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:51:13,946 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/sqrt1-ll_valuebound1.c[520,533] [2021-05-02 22:51:13,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:51:13,966 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:51:13,984 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/sqrt1-ll_valuebound1.c[520,533] [2021-05-02 22:51:13,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:51:14,001 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:51:14,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:14 WrapperNode [2021-05-02 22:51:14,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:51:14,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:51:14,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:51:14,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:51:14,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:14" (1/1) ... [2021-05-02 22:51:14,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:14" (1/1) ... [2021-05-02 22:51:14,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:14" (1/1) ... [2021-05-02 22:51:14,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:14" (1/1) ... [2021-05-02 22:51:14,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:14" (1/1) ... [2021-05-02 22:51:14,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:14" (1/1) ... [2021-05-02 22:51:14,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:14" (1/1) ... [2021-05-02 22:51:14,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:51:14,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:51:14,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:51:14,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:51:14,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:14" (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 22:51:14,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:51:14,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:51:14,111 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:51:14,112 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:51:14,112 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:51:14,112 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:51:14,112 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:51:14,112 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:51:14,112 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:51:14,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:51:14,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 22:51:14,113 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:51:14,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:51:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:51:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:51:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:51:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:51:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:51:14,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:51:14,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:51:14,374 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:51:14,374 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:51:14,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:14 BoogieIcfgContainer [2021-05-02 22:51:14,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:51:14,376 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:51:14,376 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:51:14,393 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:51:14,396 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:14" (1/1) ... [2021-05-02 22:51:14,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:51:14 BasicIcfg [2021-05-02 22:51:14,427 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:51:14,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:51:14,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:51:14,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:51:14,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:51:13" (1/4) ... [2021-05-02 22:51:14,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbbd1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:51:14, skipping insertion in model container [2021-05-02 22:51:14,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:14" (2/4) ... [2021-05-02 22:51:14,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbbd1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:51:14, skipping insertion in model container [2021-05-02 22:51:14,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:14" (3/4) ... [2021-05-02 22:51:14,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbbd1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:51:14, skipping insertion in model container [2021-05-02 22:51:14,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:51:14" (4/4) ... [2021-05-02 22:51:14,433 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound1.cJordan [2021-05-02 22:51:14,438 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:51:14,441 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:51:14,454 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:51:14,470 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:51:14,470 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:51:14,470 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:51:14,470 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:51:14,470 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:51:14,470 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:51:14,470 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:51:14,470 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:51:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:51:14,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:51:14,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:14,487 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:14,487 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:14,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:14,492 INFO L82 PathProgramCache]: Analyzing trace with hash -179702132, now seen corresponding path program 1 times [2021-05-02 22:51:14,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:14,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023404646] [2021-05-02 22:51:14,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:14,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:51:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:14,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:51:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:51:14,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:14,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023404646] [2021-05-02 22:51:14,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023404646] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:51:14,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:51:14,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:51:14,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845790768] [2021-05-02 22:51:14,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:51:14,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:14,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:51:14,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:51:14,789 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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) [2021-05-02 22:51:14,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:14,912 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-05-02 22:51:14,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:51:14,914 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 [2021-05-02 22:51:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:14,920 INFO L225 Difference]: With dead ends: 31 [2021-05-02 22:51:14,921 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 22:51:14,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:51:14,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 22:51:14,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 22:51:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:51:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-02 22:51:14,957 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-02 22:51:14,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:14,957 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-02 22:51:14,958 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) [2021-05-02 22:51:14,958 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-02 22:51:14,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:51:14,958 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:14,959 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:14,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:51:14,959 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:14,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:14,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1985279762, now seen corresponding path program 1 times [2021-05-02 22:51:14,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:14,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376237486] [2021-05-02 22:51:14,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:15,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:51:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:15,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:51:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:51:15,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:15,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376237486] [2021-05-02 22:51:15,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376237486] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:51:15,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:51:15,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 22:51:15,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244498064] [2021-05-02 22:51:15,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:51:15,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:15,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:51:15,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:15,117 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:15,400 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 22:51:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:15,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:51:15,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:15,403 INFO L225 Difference]: With dead ends: 38 [2021-05-02 22:51:15,404 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 22:51:15,405 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 22:51:15,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-02 22:51:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:51:15,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 22:51:15,424 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2021-05-02 22:51:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:15,424 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 22:51:15,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 22:51:15,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 22:51:15,427 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:15,428 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:15,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 22:51:15,430 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:15,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:15,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1146988413, now seen corresponding path program 1 times [2021-05-02 22:51:15,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:15,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082625226] [2021-05-02 22:51:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:15,451 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:15,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687625358] [2021-05-02 22:51:15,452 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 22:51:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:15,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 22:51:15,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:51:15,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:15,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082625226] [2021-05-02 22:51:15,683 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:15,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687625358] [2021-05-02 22:51:15,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687625358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:15,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:15,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:15,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970399790] [2021-05-02 22:51:15,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:15,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:15,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:15,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:15,686 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:51:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:15,811 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-02 22:51:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:15,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 22:51:15,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:15,813 INFO L225 Difference]: With dead ends: 42 [2021-05-02 22:51:15,813 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 22:51:15,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:15,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 22:51:15,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 22:51:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:51:15,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-02 22:51:15,818 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2021-05-02 22:51:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:15,819 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-02 22:51:15,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:51:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-02 22:51:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 22:51:15,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:15,820 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:16,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 22:51:16,043 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:16,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:16,044 INFO L82 PathProgramCache]: Analyzing trace with hash 196845204, now seen corresponding path program 1 times [2021-05-02 22:51:16,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:16,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322484572] [2021-05-02 22:51:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:16,061 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:16,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820609607] [2021-05-02 22:51:16,061 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 22:51:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:16,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 22:51:16,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:51:16,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:16,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322484572] [2021-05-02 22:51:16,261 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:16,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820609607] [2021-05-02 22:51:16,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820609607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:16,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:16,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:51:16,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153532775] [2021-05-02 22:51:16,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:51:16,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:16,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:51:16,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:16,264 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 22:51:16,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:16,340 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-05-02 22:51:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:51:16,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 22:51:16,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:16,343 INFO L225 Difference]: With dead ends: 51 [2021-05-02 22:51:16,343 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 22:51:16,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 22:51:16,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-05-02 22:51:16,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:51:16,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-05-02 22:51:16,354 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 34 [2021-05-02 22:51:16,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:16,354 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-05-02 22:51:16,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 22:51:16,355 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-05-02 22:51:16,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 22:51:16,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:16,356 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:16,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:16,565 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:16,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:16,565 INFO L82 PathProgramCache]: Analyzing trace with hash -374953577, now seen corresponding path program 2 times [2021-05-02 22:51:16,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:16,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318102035] [2021-05-02 22:51:16,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:16,576 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:16,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502263273] [2021-05-02 22:51:16,576 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 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 22:51:16,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:51:16,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:16,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:51:16,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 22:51:16,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:16,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318102035] [2021-05-02 22:51:16,778 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:16,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502263273] [2021-05-02 22:51:16,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502263273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:16,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:16,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:16,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858476455] [2021-05-02 22:51:16,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:16,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:16,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:16,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:16,780 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 22:51:16,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:16,924 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-05-02 22:51:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:16,924 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-02 22:51:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:16,926 INFO L225 Difference]: With dead ends: 55 [2021-05-02 22:51:16,926 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 22:51:16,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:16,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 22:51:16,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 22:51:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:51:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-02 22:51:16,939 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 39 [2021-05-02 22:51:16,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:16,939 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-02 22:51:16,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 22:51:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-02 22:51:16,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 22:51:16,940 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:16,940 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:17,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:17,157 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:17,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:17,157 INFO L82 PathProgramCache]: Analyzing trace with hash -786894479, now seen corresponding path program 3 times [2021-05-02 22:51:17,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:17,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536525185] [2021-05-02 22:51:17,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:17,173 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:17,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344995552] [2021-05-02 22:51:17,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:17,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 22:51:17,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:17,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:51:17,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:17,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 22:51:17,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:17,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536525185] [2021-05-02 22:51:17,401 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:17,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344995552] [2021-05-02 22:51:17,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344995552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:17,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:17,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:17,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598533442] [2021-05-02 22:51:17,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:17,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:17,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:17,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:17,402 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:51:17,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:17,508 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-05-02 22:51:17,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:17,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-02 22:51:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:17,509 INFO L225 Difference]: With dead ends: 59 [2021-05-02 22:51:17,509 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 22:51:17,510 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:17,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 22:51:17,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 22:51:17,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:51:17,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-05-02 22:51:17,514 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 44 [2021-05-02 22:51:17,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:17,514 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-05-02 22:51:17,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:51:17,515 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-05-02 22:51:17,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 22:51:17,515 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:17,516 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:17,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:17,729 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:17,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:17,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1256212910, now seen corresponding path program 4 times [2021-05-02 22:51:17,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:17,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874973983] [2021-05-02 22:51:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:17,738 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:17,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642214853] [2021-05-02 22:51:17,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:17,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:51:17,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:17,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 22:51:17,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:17,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:17,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 22:51:18,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:18,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874973983] [2021-05-02 22:51:18,034 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:18,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642214853] [2021-05-02 22:51:18,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642214853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:18,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:18,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:51:18,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866840164] [2021-05-02 22:51:18,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:51:18,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:18,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:51:18,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:18,036 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 22:51:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:18,086 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 22:51:18,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:18,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-02 22:51:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:18,087 INFO L225 Difference]: With dead ends: 42 [2021-05-02 22:51:18,087 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 22:51:18,087 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:51:18,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 22:51:18,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 22:51:18,088 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 22:51:18,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 22:51:18,088 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2021-05-02 22:51:18,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:18,088 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 22:51:18,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 22:51:18,088 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 22:51:18,089 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 22:51:18,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 22:51:18,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:51:18 BasicIcfg [2021-05-02 22:51:18,308 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:51:18,309 INFO L168 Benchmark]: Toolchain (without parser) took 4496.20 ms. Allocated memory was 178.3 MB in the beginning and 228.6 MB in the end (delta: 50.3 MB). Free memory was 143.8 MB in the beginning and 116.5 MB in the end (delta: 27.3 MB). Peak memory consumption was 78.3 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:18,309 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 178.3 MB. Free memory is still 160.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:51:18,309 INFO L168 Benchmark]: CACSL2BoogieTranslator took 187.49 ms. Allocated memory is still 178.3 MB. Free memory was 143.6 MB in the beginning and 161.7 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:18,309 INFO L168 Benchmark]: Boogie Preprocessor took 30.42 ms. Allocated memory is still 178.3 MB. Free memory was 161.7 MB in the beginning and 160.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:18,309 INFO L168 Benchmark]: RCFGBuilder took 331.56 ms. Allocated memory is still 178.3 MB. Free memory was 160.2 MB in the beginning and 146.0 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:18,309 INFO L168 Benchmark]: IcfgTransformer took 50.91 ms. Allocated memory is still 178.3 MB. Free memory was 146.0 MB in the beginning and 144.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:18,309 INFO L168 Benchmark]: TraceAbstraction took 3880.02 ms. Allocated memory was 178.3 MB in the beginning and 228.6 MB in the end (delta: 50.3 MB). Free memory was 143.9 MB in the beginning and 116.5 MB in the end (delta: 27.4 MB). Peak memory consumption was 79.3 MB. Max. memory is 8.0 GB. [2021-05-02 22:51:18,310 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 178.3 MB. Free memory is still 160.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 187.49 ms. Allocated memory is still 178.3 MB. Free memory was 143.6 MB in the beginning and 161.7 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.42 ms. Allocated memory is still 178.3 MB. Free memory was 161.7 MB in the beginning and 160.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 331.56 ms. Allocated memory is still 178.3 MB. Free memory was 160.2 MB in the beginning and 146.0 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 50.91 ms. Allocated memory is still 178.3 MB. Free memory was 146.0 MB in the beginning and 144.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3880.02 ms. Allocated memory was 178.3 MB in the beginning and 228.6 MB in the end (delta: 50.3 MB). Free memory was 143.9 MB in the beginning and 116.5 MB in the end (delta: 27.4 MB). Peak memory consumption was 79.3 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, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3837.2ms, OverallIterations: 7, TraceHistogramMax: 7, EmptinessCheckTime: 14.8ms, AutomataDifference: 952.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 192 SDtfs, 84 SDslu, 586 SDs, 0 SdLazy, 494 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 471.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 214 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 461.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=6, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 71.2ms AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 77.7ms SsaConstructionTime, 174.1ms SatisfiabilityAnalysisTime, 1112.8ms InterpolantComputationTime, 224 NumberOfCodeBlocks, 207 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 217 ConstructedInterpolants, 0 QuantifiedInterpolants, 672 SizeOfPredicates, 14 NumberOfNonLiveVariables, 661 ConjunctsInSsa, 87 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 167/192 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...